Develop Reference

"Magnific Popup" and leaving when hovering a div that opens a popup

After closing the popup, the div should be hidden (and when the pop-up is open it really hides), but when the pop-up is closed, it becomes visible.
// Magnific Popup v1.1.0 by Dmitry Semenov
(function(a){typeof define=="function"&&define.amd?define(["jquery"],a):typeof exports=="object"?a(require("jquery")):a(window.jQuery||window.Zepto)})(function(a){var b="Close",c="BeforeClose",d="AfterClose",e="BeforeAppend",f="MarkupParse",g="Open",h="Change",i="mfp",j="."+i,k="mfp-ready",l="mfp-removing",m="mfp-prevent-close",n,o=function(){},p=!!window.jQuery,q,r=a(window),s,t,u,v,w=function(a,b){n.ev.on(i+a+j,b)},x=function(b,c,d,e){var f=document.createElement("div");return f.className="mfp-"+b,d&&(f.innerHTML=d),e?c&&c.appendChild(f):(f=a(f),c&&f.appendTo(c)),f},y=function(b,c){n.ev.triggerHandler(i+b,c),n.st.callbacks&&(b=b.charAt(0).toLowerCase()+b.slice(1),n.st.callbacks[b]&&n.st.callbacks[b].apply(n,a.isArray(c)?c:[c]))},z=function(b){if(b!==v||!n.currTemplate.closeBtn)n.currTemplate.closeBtn=a(n.st.closeMarkup.replace("%title%",n.st.tClose)),v=b;return n.currTemplate.closeBtn},A=function(){a.magnificPopup.instance||(n=new o,n.init(),a.magnificPopup.instance=n)},B=function(){var a=document.createElement("p").style,b=["ms","O","Moz","Webkit"];if(a.transition!==undefined)return!0;while(b.length)if(b.pop()+"Transition"in a)return!0;return!1};o.prototype={constructor:o,init:function(){var b=navigator.appVersion;n.isLowIE=n.isIE8=document.all&&!document.addEventListener,n.isAndroid=/android/gi.test(b),n.isIOS=/iphone|ipad|ipod/gi.test(b),n.supportsTransition=B(),n.probablyMobile=n.isAndroid||n.isIOS||/(Opera Mini)|Kindle|webOS|BlackBerry|(Opera Mobi)|(Windows Phone)|IEMobile/i.test(navigator.userAgent),s=a(document),n.popupsCache={}},open:function(b){var c;if(b.isObj===!1){n.items=b.items.toArray(),n.index=0;var d=b.items,e;for(c=0;c<d.length;c++){e=d[c],e.parsed&&(e=e.el[0]);if(e===b.el[0]){n.index=c;break}}}else n.items=a.isArray(b.items)?b.items:[b.items],n.index=b.index||0;if(n.isOpen){n.updateItemHTML();return}n.types=[],u="",b.mainEl&&b.mainEl.length?n.ev=b.mainEl.eq(0):n.ev=s,b.key?(n.popupsCache[b.key]||(n.popupsCache[b.key]={}),n.currTemplate=n.popupsCache[b.key]):n.currTemplate={},n.st=a.extend(!0,{},a.magnificPopup.defaults,b),n.fixedContentPos=n.st.fixedContentPos==="auto"?!n.probablyMobile:n.st.fixedContentPos,n.st.modal&&(n.st.closeOnContentClick=!1,n.st.closeOnBgClick=!1,n.st.showCloseBtn=!1,n.st.enableEscapeKey=!1),n.bgOverlay||(n.bgOverlay=x("bg").on("click"+j,function(){n.close()}),n.wrap=x("wrap").attr("tabindex",-1).on("click"+j,function(a){n._checkIfClose(a.target)&&n.close()}),n.container=x("container",n.wrap)),n.contentContainer=x("content"),n.st.preloader&&(n.preloader=x("preloader",n.container,n.st.tLoading));var h=a.magnificPopup.modules;for(c=0;c<h.length;c++){var i=h[c];i=i.charAt(0).toUpperCase()+i.slice(1),n["init"+i].call(n)}y("BeforeOpen"),n.st.showCloseBtn&&(n.st.closeBtnInside?(w(f,function(a,b,c,d){c.close_replaceWith=z(d.type)}),u+=" mfp-close-btn-in"):n.wrap.append(z())),n.st.alignTop&&(u+=" mfp-align-top"),n.fixedContentPos?n.wrap.css({overflow:n.st.overflowY,overflowX:"hidden",overflowY:n.st.overflowY}):n.wrap.css({top:r.scrollTop(),position:"absolute"}),(n.st.fixedBgPos===!1||n.st.fixedBgPos==="auto"&&!n.fixedContentPos)&&n.bgOverlay.css({height:s.height(),position:"absolute"}),n.st.enableEscapeKey&&s.on("keyup"+j,function(a){a.keyCode===27&&n.close()}),r.on("resize"+j,function(){n.updateSize()}),n.st.closeOnContentClick||(u+=" mfp-auto-cursor"),u&&n.wrap.addClass(u);var l=n.wH=r.height(),m={};if(n.fixedContentPos&&n._hasScrollBar(l)){var o=n._getScrollbarSize();o&&(m.marginRight=o)}n.fixedContentPos&&(n.isIE7?a("body, html").css("overflow","hidden"):m.overflow="hidden");var p=n.st.mainClass;return n.isIE7&&(p+=" mfp-ie7"),p&&n._addClassToMFP(p),n.updateItemHTML(),y("BuildControls"),a("html").css(m),n.bgOverlay.add(n.wrap).prependTo(n.st.prependTo||a(document.body)),n._lastFocusedEl=document.activeElement,setTimeout(function(){n.content?(n._addClassToMFP(k),n._setFocus()):n.bgOverlay.addClass(k),s.on("focusin"+j,n._onFocusIn)},16),n.isOpen=!0,n.updateSize(l),y(g),b},close:function(){if(!n.isOpen)return;y(c),n.isOpen=!1,n.st.removalDelay&&!n.isLowIE&&n.supportsTransition?(n._addClassToMFP(l),setTimeout(function(){n._close()},n.st.removalDelay)):n._close()},_close:function(){y(b);var c=l+" "+k+" ";n.bgOverlay.detach(),n.wrap.detach(),n.container.empty(),n.st.mainClass&&(c+=n.st.mainClass+" "),n._removeClassFromMFP(c);if(n.fixedContentPos){var e={marginRight:""};n.isIE7?a("body, html").css("overflow",""):e.overflow="",a("html").css(e)}s.off("keyup"+j+" focusin"+j),n.ev.off(j),n.wrap.attr("class","mfp-wrap").removeAttr("style"),n.bgOverlay.attr("class","mfp-bg"),n.container.attr("class","mfp-container"),n.st.showCloseBtn&&(!n.st.closeBtnInside||n.currTemplate[n.currItem.type]===!0)&&n.currTemplate.closeBtn&&n.currTemplate.closeBtn.detach(),n.st.autoFocusLast&&n._lastFocusedEl&&a(n._lastFocusedEl).focus(),n.currItem=null,n.content=null,n.currTemplate=null,n.prevHeight=0,y(d)},updateSize:function(a){if(n.isIOS){var b=document.documentElement.clientWidth/window.innerWidth,c=window.innerHeight*b;n.wrap.css("height",c),n.wH=c}else n.wH=a||r.height();n.fixedContentPos||n.wrap.css("height",n.wH),y("Resize")},updateItemHTML:function(){var b=n.items[n.index];n.contentContainer.detach(),n.content&&n.content.detach(),b.parsed||(b=n.parseEl(n.index));var c=b.type;y("BeforeChange",[n.currItem?n.currItem.type:"",c]),n.currItem=b;if(!n.currTemplate[c]){var d=n.st[c]?n.st[c].markup:!1;y("FirstMarkupParse",d),d?n.currTemplate[c]=a(d):n.currTemplate[c]=!0}t&&t!==b.type&&n.container.removeClass("mfp-"+t+"-holder");var e=n["get"+c.charAt(0).toUpperCase()+c.slice(1)](b,n.currTemplate[c]);n.appendContent(e,c),b.preloaded=!0,y(h,b),t=b.type,n.container.prepend(n.contentContainer),y("AfterChange")},appendContent:function(a,b){n.content=a,a?n.st.showCloseBtn&&n.st.closeBtnInside&&n.currTemplate[b]===!0?n.content.find(".mfp-close").length||n.content.append(z()):n.content=a:n.content="",y(e),n.container.addClass("mfp-"+b+"-holder"),n.contentContainer.append(n.content)},parseEl:function(b){var c=n.items[b],d;c.tagName?c={el:a(c)}:(d=c.type,c={data:c,src:c.src});if(c.el){var e=n.types;for(var f=0;f<e.length;f++)if(c.el.hasClass("mfp-"+e[f])){d=e[f];break}c.src=c.el.attr("data-mfp-src"),c.src||(c.src=c.el.attr("href"))}return c.type=d||n.st.type||"inline",c.index=b,c.parsed=!0,n.items[b]=c,y("ElementParse",c),n.items[b]},addGroup:function(a,b){var c=function(c){c.mfpEl=this,n._openClick(c,a,b)};b||(b={});var d="click.magnificPopup";b.mainEl=a,b.items?(b.isObj=!0,a.off(d).on(d,c)):(b.isObj=!1,b.delegate?a.off(d).on(d,b.delegate,c):(b.items=a,a.off(d).on(d,c)))},_openClick:function(b,c,d){var e=d.midClick!==undefined?d.midClick:a.magnificPopup.defaults.midClick;if(!e&&(b.which===2||b.ctrlKey||b.metaKey||b.altKey||b.shiftKey))return;var f=d.disableOn!==undefined?d.disableOn:a.magnificPopup.defaults.disableOn;if(f)if(a.isFunction(f)){if(!f.call(n))return!0}else if(r.width()<f)return!0;b.type&&(b.preventDefault(),n.isOpen&&b.stopPropagation()),d.el=a(b.mfpEl),d.delegate&&(d.items=c.find(d.delegate)),n.open(d)},updateStatus:function(a,b){if(n.preloader){q!==a&&n.container.removeClass("mfp-s-"+q),!b&&a==="loading"&&(b=n.st.tLoading);var c={status:a,text:b};y("UpdateStatus",c),a=c.status,b=c.text,n.preloader.html(b),n.preloader.find("a").on("click",function(a){a.stopImmediatePropagation()}),n.container.addClass("mfp-s-"+a),q=a}},_checkIfClose:function(b){if(a(b).hasClass(m))return;var c=n.st.closeOnContentClick,d=n.st.closeOnBgClick;if(c&&d)return!0;if(!n.content||a(b).hasClass("mfp-close")||n.preloader&&b===n.preloader[0])return!0;if(b!==n.content[0]&&!a.contains(n.content[0],b)){if(d&&a.contains(document,b))return!0}else if(c)return!0;return!1},_addClassToMFP:function(a){n.bgOverlay.addClass(a),n.wrap.addClass(a)},_removeClassFromMFP:function(a){this.bgOverlay.removeClass(a),n.wrap.removeClass(a)},_hasScrollBar:function(a){return(n.isIE7?s.height():document.body.scrollHeight)>(a||r.height())},_setFocus:function(){(n.st.focus?n.content.find(n.st.focus).eq(0):n.wrap).focus()},_onFocusIn:function(b){if(b.target!==n.wrap[0]&&!a.contains(n.wrap[0],b.target))return n._setFocus(),!1},_parseMarkup:function(b,c,d){var e;d.data&&(c=a.extend(d.data,c)),y(f,[b,c,d]),a.each(c,function(c,d){if(d===undefined||d===!1)return!0;e=c.split("_");if(e.length>1){var f=b.find(j+"-"+e[0]);if(f.length>0){var g=e[1];g==="replaceWith"?f[0]!==d[0]&&f.replaceWith(d):g==="img"?f.is("img")?f.attr("src",d):f.replaceWith(a("<img>").attr("src",d).attr("class",f.attr("class"))):f.attr(e[1],d)}}else b.find(j+"-"+c).html(d)})},_getScrollbarSize:function(){if(n.scrollbarSize===undefined){var a=document.createElement("div");a.style.cssText="width: 99px; height: 99px; overflow: scroll; position: absolute; top: -9999px;",document.body.appendChild(a),n.scrollbarSize=a.offsetWidth-a.clientWidth,document.body.removeChild(a)}return n.scrollbarSize}},a.magnificPopup={instance:null,proto:o.prototype,modules:[],open:function(b,c){return A(),b?b=a.extend(!0,{},b):b={},b.isObj=!0,b.index=c||0,this.instance.open(b)},close:function(){return a.magnificPopup.instance&&a.magnificPopup.instance.close()},registerModule:function(b,c){c.options&&(a.magnificPopup.defaults[b]=c.options),a.extend(this.proto,c.proto),this.modules.push(b)},defaults:{disableOn:0,key:null,midClick:!1,mainClass:"",preloader:!0,focus:"",closeOnContentClick:!1,closeOnBgClick:!0,closeBtnInside:!0,showCloseBtn:!0,enableEscapeKey:!0,modal:!1,alignTop:!1,removalDelay:0,prependTo:null,fixedContentPos:"auto",fixedBgPos:"auto",overflowY:"auto",closeMarkup:'<button title="%title%" type="button" class="mfp-close">×</button>',tClose:"Close (Esc)",tLoading:"Loading...",autoFocusLast:!0}},a.fn.magnificPopup=function(b){A();var c=a(this);if(typeof b=="string")if(b==="open"){var d,e=p?c.data("magnificPopup"):c[0].magnificPopup,f=parseInt(arguments[1],10)||0;e.items?d=e.items[f]:(d=c,e.delegate&&(d=d.find(e.delegate)),d=d.eq(f)),n._openClick({mfpEl:d},c,e)}else n.isOpen&&n[b].apply(n,Array.prototype.slice.call(arguments,1));else b=a.extend(!0,{},b),p?c.data("magnificPopup",b):c[0].magnificPopup=b,n.addGroup(c,b);return c};var C="inline",D,E,F,G=function(){F&&(E.after(F.addClass(D)).detach(),F=null)};a.magnificPopup.registerModule(C,{options:{hiddenClass:"hide",markup:"",tNotFound:"Content not found"},proto:{initInline:function(){n.types.push(C),w(b+"."+C,function(){G()})},getInline:function(b,c){G();if(b.src){var d=n.st.inline,e=a(b.src);if(e.length){var f=e[0].parentNode;f&&f.tagName&&(E||(D=d.hiddenClass,E=x(D),D="mfp-"+D),F=e.after(E).detach().removeClass(D)),n.updateStatus("ready")}else n.updateStatus("error",d.tNotFound),e=a("<div>");return b.inlineElement=e,e}return n.updateStatus("ready"),n._parseMarkup(c,{},b),c}}});var H,I=function(){return H===undefined&&(H=document.createElement("p").style.MozTransform!==undefined),H};a.magnificPopup.registerModule("zoom",{options:{enabled:!1,easing:"ease-in-out",duration:300,opener:function(a){return a.is("img")?a:a.find("img")}},proto:{initZoom:function(){var a=n.st.zoom,d=".zoom",e;if(!a.enabled||!n.supportsTransition)return;var f=a.duration,g=function(b){var c=b.clone().removeAttr("style").removeAttr("class").addClass("mfp-animated-image"),d="all "+a.duration/1e3+"s "+a.easing,e={position:"fixed",zIndex:9999,left:0,top:0,"-webkit-backface-visibility":"hidden"},f="transition";return e["-webkit-"+f]=e["-moz-"+f]=e["-o-"+f]=e[f]=d,c.css(e),c},h=function(){n.content.css("visibility","visible")},i,j;w("BuildControls"+d,function(){if(n._allowZoom()){clearTimeout(i),n.content.css("visibility","hidden"),e=n._getItemToZoom();if(!e){h();return}j=g(e),j.css(n._getOffset()),n.wrap.append(j),i=setTimeout(function(){j.css(n._getOffset(!0)),i=setTimeout(function(){h(),setTimeout(function(){j.remove(),e=j=null,y("ZoomAnimationEnded")},16)},f)},16)}}),w(c+d,function(){if(n._allowZoom()){clearTimeout(i),n.st.removalDelay=f;if(!e){e=n._getItemToZoom();if(!e)return;j=g(e)}j.css(n._getOffset(!0)),n.wrap.append(j),n.content.css("visibility","hidden"),setTimeout(function(){j.css(n._getOffset())},16)}}),w(b+d,function(){n._allowZoom()&&(h(),j&&j.remove(),e=null)})},_allowZoom:function(){return n.currItem.type==="image"},_getItemToZoom:function(){return n.currItem.hasSize?n.currItem.img:!1},_getOffset:function(b){var c;b?c=n.currItem.img:c=n.st.zoom.opener(n.currItem.el||n.currItem);var d=c.offset(),e=parseInt(c.css("padding-top"),10),f=parseInt(c.css("padding-bottom"),10);d.top-=a(window).scrollTop()-e;var g={width:c.width(),height:(p?c.innerHeight():c[0].offsetHeight)-f-e};return I()?g["-moz-transform"]=g.transform="translate("+d.left+"px,"+d.top+"px)":(g.left=d.left,g.top=d.top),g}}}),A()})
/* Magnific Popup CSS */
.mfp-bg {
top: 0;
left: 0;
width: 100%;
height: 100%;
z-index: 1042;
overflow: hidden;
position: fixed;
background: #0b0b0b;
opacity: 0.8; }
.mfp-wrap {
top: 0;
left: 0;
width: 100%;
height: 100%;
z-index: 1043;
position: fixed;
outline: none !important;
-webkit-backface-visibility: hidden; }
.mfp-hide {
display: none !important; }
<script src="//ajax.googleapis.com/ajax/libs/jquery/1.12.4/jquery.min.js"></script>
<!doctype html>
<head>
<style>
.div_show {
height: 33px; width: 198px; background-color: rgb(0, 123, 209);
position: absolute;
transition: bottom .3s;
bottom: -33px;
}
.hoverside:hover .div_show{
bottom: 0px;
}
.hoverside {
background-color: rgb(255, 255, 255);
width: 200px;
height: 150px;
border-radius: 3px;
border: 1px solid #dddddd;
float: left;
position: relative;
overflow: hidden;
}
.popup{
width: 400px;
height:150px;
background-color: #f5f5f5;
position: absolute;
bottom: 40%;
left: 50%;
}
</style>
</head>
<body>
<script type="text/javascript">
jQuery(document).ready(function($) {
$('.popup-content').magnificPopup({
type: 'inline'
});
});
</script>
<div>
<div class="hoverside">
<a href="#popup" class="popup-content">
<div class="div_show">
<p class="link">Click</p>
</div>
</a>
<div id="popup" class="popup mfp-hide">
<h3>Popup</h3>
</div>
</div>
</div>
Point to the area, the blue div appears. Make a click. A pop-up window appears and the blue div disappears. Ok, that's what I need. But when you close the pop-up window, the blue div will reappear. How to fix it?

use the default plugin css. after that just active the plugin. then do cuatomize what you need.
here are the repo http://dimsemenov.com/plugins/magnific-popup/

If you set to autoFocusLast: true last focused element before popup show up will be focused after popup close. You can set autoFocusLast: false for hiding the last focused element.
Example demo: https://codepen.io/rubel/pen/ZZQved
See more information: https://dimsemenov.com/plugins/magnific-popup/documentation.html#autofocuslast

Background doesn't repeat to the left

Im trying to do a slider menu, i have a div with a tape background, all is working fine when it's animating to the left by the background-repeat, but when it is animating to the right and it get to the left border of the background it get disappears because background-repeat doesn't repeat to the left, just to the right.. There's way to make the background repeat to the left?
And the list inside the "slider" div doesn't move at the same velocity of "slider" div
Here is the HTML code
<!DOCTYPE html>
<html>
<head>
<title>Prueba</title>
<link type = "text/css" rel = "stylesheet" href = "PruebaIndex.css">
<script type = "text/javascript" src = "jquery-2.1.4.js"></script>
<script>
$(document).ready(function(){
var mode = 0; // 0 Left - 1 Right
autoSlider();
function autoSlider(){
mode = 0;
$("#slider").animate({left: "-=60px", width: "+=60px"}, 'slow', 'linear', autoSlider);
}
function slideLeft(){
mode = 1;
$("#slider").animate({left: "+=60px", width: "-=60px"}, 'slow', 'linear', slideLeft);
}
$("#slider").mouseover(function(){
$("#slider").stop();
});
$("#slider").mouseout(function(){
if(mode === 0)
autoSlider();
else
slideLeft();
});
$("#Left").mouseover(function(){
$("#slider").stop();
autoSlider();
});
$("#Right").mouseover(function(){
$("#slider").stop();
slideLeft();
});
});
</script>
</head>
<body>
<div id = "wrapper">
<div id = "slider">
<ul>
<li>1</li>
<li>2</li>
<li>3</li>
</ul>
</div>
<div id = "Left">
Left
</div>
<div id = "Right">
Right
</div>
</div>
</body>
</html>
And the CSS code
*{
padding: 0;
margin: 0;
}
#slider {
padding: 0;
left: 0px;
background-color: black;
background-image: url("http://s11.postimg.org/msh93rl8z/Tira_Fotografica.png");
background-repeat: repeat-x;
width: 800px;
height: 304px;
position: relative;
overflow: hidden;
}
#wrapper {
width: 800px;
height: 1000px;
margin: 0 auto;
text-align: center;
overflow: hidden;
}
#Left {
width: 100px;
height: 100px;
position: absolute;
color: white;
background-color: black;
margin-top: -200px;
margin-left: -100px;
}
#Right {
width: 100px;
height: 100px;
position: absolute;
color: white;
background-color: black;
margin-top: -200px;
margin-left: 800px;
}
#slider ul {
list-style: none;
}
#slider ul li {
display: inline-block;
width: 200px;
height: 200px;
position: relative;
background-color: white;
margin: 50px 10px 0px 0px;
}
I tried to put the code on JSFiddle but it doesn't run..
Sorry for my bad english

it works. see here: https://jsfiddle.net/cLv4hLfy/
take a look at the #slider element.
this values are annoying ;-)
<div style="left: -5863.5px; width: 6663.8px; overflow: hidden;" id="slider">
left is decreasing and width is getting bigger and bigger.
when the slider goes to the opposite direction left gets bigger and width convergates to 0px.
[EDIT]: so the background is not animated. the div is animated. what about fix the div and animate something in the div. you could do something also with background position when its repeated.

Creating hover-visible buttons

I am trying to create some options that are hidden unless the user goes with the mouse in a specific area. Let's take an example: Google+ profile page:
When you go with the mouse cursor on the picture, the button appears.
Here is what I tried:
var $button = $("#button");
$("#profile-picture").on("mouseover", function() {
$button.show();
}).on("mouseout", function() {
$button.hide();
});
#profile-picture {
width: 150px;
height: 100px;
}
#button {
position: absolute;
display: none;
width: 30px;
height: 30px;
top: 45px;
left: 70px;
opacity: 0.75;
cursor: pointer;
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<img src="http://datastore01.rediff.com/h450-w670/thumb/69586A645B6D2A2E3131/ckez1n08svw8f3en.D.0.Sidharth-Malhotra-Student-of-the-Year-Photo.jpg" id="profile-picture">
<img src="http://img3.wikia.nocookie.net/__cb20090227194712/java/images/0/0e/Camera_icon.gif" id="button" />
The problem is that when I go with the cursor over the #button, it flickers. What can I do?

The easiest method is placing them both in the same div, and then using mouseover/out for that div. Example: http://jsfiddle.net/1g24mhhz/
HTML:
<div id="profile-picture">
<img src="http://datastore01.rediff.com/h450-w670/thumb/69586A645B6D2A2E3131/ckez1n08svw8f3en.D.0.Sidharth-Malhotra-Student-of-the-Year-Photo.jpg" class="profile">
<img src="http://img3.wikia.nocookie.net/__cb20090227194712/java/images/0/0e/Camera_icon.gif" id="button" />
</div>
CSS edits:
#profile-picture .profile {
width: 150px;
height: 100px;
}
EDIT: You should probably not use an ID for the div, since you probably have multiple profiles on a page. This was just to show it with the code you had already used.

A simple css approach. You can have a click event on the button :)
$('#button').on('click', function() {
alert('I am clickable');
});
#profile-picture,
.hover-wrap {
width: 150px;
height: 100px;
}
#button {
position: absolute;
display: none;
width: 30px;
height: 30px;
top: 0px;
left: 0px;
bottom: 0;
right: 0;
margin: auto;
opacity: 0.75;
cursor: pointer;
}
.hover-wrap {
position: relative;
}
.hover-wrap:hover #button {
display: block;
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.9.1/jquery.min.js"></script>
<div class="hover-wrap">
<img src="http://datastore01.rediff.com/h450-w670/thumb/69586A645B6D2A2E3131/ckez1n08svw8f3en.D.0.Sidharth-Malhotra-Student-of-the-Year-Photo.jpg" id="profile-picture">
<img src="http://img3.wikia.nocookie.net/__cb20090227194712/java/images/0/0e/Camera_icon.gif" id="button" />
</div>

You can use CSS:hover properties to show/hide the button, no Javascript needed.
The trick is a sibling selector:
#profile-picture:hover + #button, #button:hover{
display:block;
}
Try this:
http://jsfiddle.net/6s9200ab/

make footer grow with jquery/css

Im creating a page where my footer is growing on a certain event.
My problem is to make the footer grow according to how much space i got.
See my code or jsFiddle. I want the gray footer to grow all the way up to the colored elements with dynamic height (instead of like now, to 20%).
I guess i could count all the elements height above but that doesn't sound like a good solution.
jsFiddle here
<html>
<head>
<style type="text/css">
body #pagePlaceHolderOuter {
background: #FFFFFF;
height: 100%;
left: 0;
position: absolute;
top: 0;
width: 100%;
}
body #pagePlaceHolderOuter #pagePlaceHolderInner {
height: 100%;
margin: 0 auto;
max-width: 1000px;
min-width: 700px;
width: 70%;
position: relative;
}
body #pagePlaceHolderOuter #pagePlaceHolderInner .div1 {
width: 100%;
height: 100px;
background: blue;
}
body #pagePlaceHolderOuter #pagePlaceHolderInner .div2 {
width: 100%;
height: 120px;
background: green;
}
body #pagePlaceHolderOuter #pagePlaceHolderInner .div3 {
width: 100%;
height: 60px;
background: red;
}
body #pagePlaceHolderOuter #pagePlaceHolderInner .footer {
background: gray;
bottom: 0;
height: 10%;
position: absolute;
width: 100%;
}
</style>
</head>
<body>
<script src="http://code.jquery.com/jquery-latest.min.js" type="text/javascript"></script>
<script>
$("#btn").click(function () {
$('body #pagePlaceHolderOuter #pagePlaceHolderInner .footer').css('height', '20%');
});
</script>
<div id="pagePlaceHolderOuter">
<div id="pagePlaceHolderInner">
<button type="button" id="btn">Click Me!</button>
<div class="div1">I have a dynamic height</div>
<div class="div2">I have a dynamic height</div>
<div class="div3">I have a dynamic height</div>
<div class="footer">Footer</div>
</div>
</div>
</body>
</html>

Instead of calculating the space of all the elements before, you can simply calculate the height of the most previous one and find the offset().top of that element. Using this approach I calculated the space (you have to make sure in your HTML the footer is directly after the previous element or slightly restructure my jQuery) and essentially you just toggle it between the default value and the default value + the space. Updated jsFiddle
$("#btn").click(function (e) {
var prev = $('.footer').prev(),
winHeight = $(window).height(),
calcTop = $('.footer').height() == Math.round(winHeight / 10) ?
(winHeight - prev.offset().top - prev.height()) : "10%";
$('body #pagePlaceHolderOuter #pagePlaceHolderInner .footer').css({
'height': calcTop
});
});
On a side note I used CSS transitions to "animate" the change, not jQuery for performance issues and for ease of editablity
If you just want the position to change, not the height, you can do it by toggling the bottom value instead. Demo of that here

Iframe and overlayed button problem

I am using an iframe now i want to have a button inside the iframe on top right which will display only on mouse over. How can i add this button? Can anyone please help me into the right direction.

jQuery
$(function() {
var close = $('#close');
$('#frame').hover(function() {
close.show();
}, function() {
close.hide();
});
});
HTML
<div id="frame">
<iframe src="http://example.com"></iframe>
<div id="close">Close</div>
</div>
CSS
#frame {
width: 400px;
height: 300px;
position: relative;
}
#frame iframe {
width: 100%;
height: 100%;
}
#close {
display: none;
position: absolute;
top: 0;
right: 0;
border: 1px solid red;
background: #fff;
padding: 5px;
}
jsFiddle.
Keep in mind this obscures a portion of the iframe. It would be a better idea to not do this.