Develop Reference

Re-sizing Image Width Using JavaScript

I am trying to re-size an image in a popup. The original image is 6000 x 4000. I do a check to see if the image is greater than 500, and if so I just try and set the image to 500. Trying to set it using 'this', makes the pop open in a tab and the image is still its original size. If I try and set the image not using 'this', the pop up works as intended regarding where it is positioned on screen and the size of the box, but the image, is still its original size--6000 x 4000. (PS: I have to use ES5 as well.)
What gives?
Thanks,
CM
<script language="javascript" type="text/javascript"><!--
// let i=0;
function resize() {
console.log("Testing");
let i=0;
if (window.navigator.userAgent.indexOf('MSIE 6.0') != -1 && window.navigator.userAgent.indexOf('SV1') != -1) {
i=30; //This browser is Internet Explorer 6.x on Windows XP SP2
} else if (window.navigator.userAgent.indexOf('MSIE 6.0') != -1) {
i=0; //This browser is Internet Explorer 6.x
} else if (window.navigator.userAgent.indexOf('Firefox') != -1 && window.navigator.userAgent.indexOf("Windows") != -1) {
i=25; //This browser is Firefox on Windows
} else if (window.navigator.userAgent.indexOf('Mozilla') != -1 && window.navigator.userAgent.indexOf("Windows") != -1) {
i=45; //This browser is Mozilla on Windows
} else {
i=80; //This is all other browsers including Mozilla on Linux
}
var imgWidth = document.images[0].width;
var imgHeight = document.images[0].height;
console.log("Original image width is: " + imgWidth);
console.log("Original image height is: " + imgHeight);
if(imgWidth > 500){
//Shrink the image to size of popup frame
this.imgWidth = 500;
this.imgHeight = 500;
console.log("Adjusted image width is: " + imgWidth);
console.log("Adjusted image height is: " + imgHeight);
//Get display/screen width and height
var screenWidth = screen.width;
var screenHeight = screen.height;
console.log("Screen width is: " + screenWidth);
console.log("Screen height is: " + screenHeight);
//Set popup position on display/screen
var leftpos = screenWidth / 2 ;
var toppos = screenHeight / 2 - imgHeight / 2;
console.log("Left position is: " + leftpos);
console.log("Top position is: " + toppos);
//Set popup frame width and height equal to adjusted image width and height
var frameWidth = imgWidth;
var frameHeight = imgHeight+i;
console.log("Frame width is: " + frameWidth);
console.log("Frame height is: " + frameHeight);
window.moveTo(leftpos, toppos);
window.resizeTo(frameWidth,frameHeight+i);
}
else if (document.documentElement && document.documentElement.clientWidth) {
var imgHeight = document.images[0].height + 40 - i;
var imgWidth = document.images[0].width + 20;
var height = screen.height;
var width = screen.width;
var leftpos = width / 2 - imgWidth / 2;
var toppos = height / 2 - imgHeight / 2;
frameWidth = imgWidth;
frameHeight = imgHeight + i;
window.moveTo(leftpos, toppos);
window.resizeTo(frameWidth, frameHeight + i);
} else if (document.body) {
window.resizeTo(document.body.clientWidth, document.body.clientHeight - i);
}
self.focus();
}//end resize() function
//--></script>

Use
var imgWidth = document.images[0].style.width;
instead of
var imgWidth = document.images[0].width;

Custom Javascript not working in Chrome

Browsed a lot, fiddled with it a lot. Came to the conclusion others may see the mistake that I am blind to.
The code is supposed to move the sidebar according to window height, sidebar height, content height, etc.
This is the code:
$(document).ready(function() {
var windowheight = $(window).height();
var identheight = $(".ident").height();
var sidebarheight = $(".sidebar").height();
var mainheight = $(".main").height();
var pos = $(window).scrollTop();
var diff = (((sidebarheight + 20) + identheight) - windowheight);
var cur = ((sidebarheight + 20) + (pos - diff)) - 2;
var max = (mainheight + 30);
contentScroll();
$(window).resize(function(){
windowheight = $(window).height();
identheight = $(".ident").height();
sidebarheight = $(".sidebar").height();
mainheight = $(".main").height();
pos = $(window).scrollTop();
diff = (((sidebarheight + 20) + identheight) - windowheight);
cur = (sidebarheight + 20) + (pos - diff);
max = (mainheight + 30);
contentScroll();
});
$(window).scroll(function (){
pos = $(window).scrollTop();
diff = (((sidebarheight + 20) + identheight) - windowheight);
cur = (sidebarheight + 20) + (pos - diff);
max = (mainheight + 30);
contentScroll();
});
function contentScroll() {
if (sidebarheight < mainheight) {
if (diff < identheight) {
if (pos >= identheight) {
$('.sidebar').css({
'margin-top' : (pos - identheight) + 'px'
});
}
} else {
if (pos >= diff && cur <= max) {
$('.sidebar').css({
'margin-top' : (pos - diff) + 'px'
});
}
if (pos <= diff) {
$('.sidebar').css({
'margin-top' : '0px'
});
}
}
}
}
});
I'm aware of it not being perfect, it's still in the rough phase. It works perfectly fine in FireFox, but not in chrome. The function is being called (tested with alerts). It just doesn't do anything.
Probably something about chrome reading syntax different.
If anyone that see's my mistake would kindly point me to it, it's been too long for me to keep cracking my head open over this.
This is the mock-website in question: http://klok-bremen.de/fff/

Use $(window).load instead of $(document).ready because the parent elements' heights will change after the images load.

Fill box dynamically with screen height

I have a box, which I am trying to size perfectly to fit within the browser viewport if the image is not larger then it. So the image would appear to be centered within the window.
Currently I don' think my method of seeking the browser height is working. And for some reason there is a lot of extra space
Example (src)
here is where I define the page sizes
if ( style['img-width'] > screenwidth ) {
style['body-width'] = style['img-width'] + ( style['img-padding'] * 2 );
} else {
style['body-width'] = screenwidth;
}
style['body-height'] = ( style['img-height'] > screenheight ) ?
( style['img-height'] +
( style['img-padding'] * 2 ) +
style['header-height']
) :
screenheight;
$('body').css({ 'width': style['body-width']+'px' });
theater.css({
'width': style['body-width']+'px',
'height': style['body-height']+'px',
});
theaterheadcon.css('width', style['body-width']+'px');
theaterheader.css('width', style['body-width']+'px');
How I am defining screen width/height
screenwidth = isNaN(window.outerWidth) ? window.clientWidth : window.outerWidth,
screenheight = isNaN(window.outerHeight) ? window.clientHeight : window.outerHeight;

Here is the basic of centering items to a content with javascript and css:
/*css*/
#myImage
{
position:absolute;
}
And in java:
/*javascript*/
var img=$('#myImage');
var winWidth=$(window).width();
var winHeight=$(window).height();
if(img.height()>winHeight)
{
img.css('height', winHeight + "px");
}
img.css('left',(winWidth/2) + "px");
img.css('top',(winHeight/2) + "px");
img.css('margin-left',(-(img.width()/2)) + "px");
img.css('margin-top',(-(img.height()/2)) + "px");
The margin approach guaranties that the image will stay at the center even on page resize

I tried here in DIVs in your case code will detect your image size itself
$(document).ready(function(){
var windowheight = $(window).height();
var windowwidth = $(window).width();
var boxheight = $('#box').outerHeight();
var boxwidth = $('#box').outerWidth();
var imgheight = $('.img').outerHeight();
var imgwidth = $('.img').outerWidth();
if(imgheight > boxheight || imgwidth > boxwidth){
$('#box').css('height', windowheight).css('width', windowwidth);
$('.img').css('margin-left',((windowwidth - imgwidth)/2)+'px');
$('.img').css('margin-top',((windowheight - imgheight)/2)+'px');
}
});
DEMO
change your img width in css to see the action
if you want your div to not going outside the window after margin the image to center use that code
$(document).ready(function(){
var windowheight = $(window).height();
var windowwidth = $(window).width();
var boxheight = $('#box').outerHeight();
var boxwidth = $('#box').outerWidth();
var imgheight = $('.img').outerHeight();
var imgwidth = $('.img').outerWidth();
if(imgheight > boxheight || imgwidth > boxwidth){
$('#box').css('position','absolute').css('width', 'auto').css('height', 'auto').css('left', '0').css('top', '0').css('right', '0').css('bottom', '0');
$('.img').css('margin-left',((windowwidth - imgwidth)/2)+'px');
$('.img').css('margin-top',((windowheight - imgheight)/2)+'px');
}
});
DEMO

Jquery $(document.body).height() is not same when viewport height is added with the window scrollTop position, at the end of document

How is the document height is smaller than the window scroll top value + the viewport height, when I scrolled down to the end of document. Should not they be the same? I am struggling with this for last couple of hours but still not getting the hang of it.
$(function(){
vpw = parseFloat($(window).width());
vph = parseFloat($(window).height());
appearh = parseFloat(vph*0.4);
dh = $(document).height();
footerh = $('#footer-area').height();
footTop = dh - footerh;
resizeDiv(vpw, vph, appearh);
$(window).scroll(function(){
scrollPos = $(window).scrollTop();
jj = vph + scrollPos;
console.log(scrollPos + '+' + vph + '=' + jj + ' is (at the bottom) ' + dh);
if(scrollPos > appearh){
addWin = parseFloat(dh - vph);
$('#trends').removeClass('hidetrends',2000).addClass('showtrends',2000);
/*console.log( dh + '>' + scrollPos + ';' + addWin );
if(scrollPos >= 1672){
$('#trends').css('position', 'relative');
}else if(scrollPos <= 1672){
$('#trends').css('position', 'fixed');
}*/
}else{
$('#trends').removeClass('showtrends',2000).addClass('hidetrends',2000);
}
});
});
window.onresize = function(event) {
resizeDiv(vpw, vph, appearh);
}
function resizeDiv(vpw, vph, appearh) {
$("#full-width").css({"height": vph + "px"});
}

Try this:
$(window).scroll(function(){
vpw = parseFloat($(window).width());
vph = parseFloat($(window).height());
appearh = parseFloat(vph*0.4);
dh = $(document).height();
footerh = $('#footer-area').height();
footTop = dh - footerh;
resizeDiv(vpw, vph, appearh);
scrollPos = $(window).scrollTop();
jj = vph + scrollPos;
console.log(scrollPos + '+' + vph + '=' + jj + ' is (at the bottom) ' + dh);
....
The reasoning behind this is I think it'd be wise to actually set your variables as you scroll

window.open invalid argument error

So I keep getting an invalid argument error whenever I try to run this script. The error occurs at window.open(url, name, features); Unfortunately I don't know how to fix this. Any ideas?
Common-Utilities.js (where the problem is coming from - line 4)
var wm = new function WindowManager() {
this.open = function (url, features) {
var name = this.getName(url);
var handle = window.open(url, name, features);
handle.focus();
return handle;
};
this.getName = function (url) {
name = getAbsolutePath(url);
return name.replace(/[:.\+\/\?\&\=\#\%\-]/g, "_").toLowerCase();
};
var getAbsolutePath = function (url) {
var a = document.createElement('a');
a.href = url;
return a.href;
}
};
openPopUp.js
function openPopup(url, width, height)
{
if (width == -1) width = 710;
if (height == -1) height = 500;
var left = (window.screen.availWidth - width) / 2;
var top = (window.screen.availHeight - height) / 2;
if (window.screenLeft>window.screen.availWidth)
{
left = left + window.screen.availWidth;
}
// open url in new browser window
var handle = wm.open(url, 'location=0, menubar=0, resizable=1, scrollbars=1, status=0, toolbar=0, width=' + width + 'px, height=' + height + 'px, top=' + top + 'px , left=' + left + 'px');
//tile the windows so user can tell a new window has been opened
if (document.body.clientHeight==height)
{
var metricTop=10;
var metricLeft=10;
var thisTop=self.screenTop+metricTop;
var thisLeft=self.screenLeft+metricLeft;
if (thisTop<0) thisTop=0;
if (thisLeft<0) thisLeft=0;
handle.moveTo(thisLeft, thisTop);
}
}
function popOutOrIn(url, title, width, height, popOut) {
if (width == -1) width = 710;
if (height == -1) height = 500;
if (popOut === 'True') {
openPopup(url, width, height)
}
else {
window.top.popUpRadWindow(url, title, width, height);
}
}

We have the code... here is the fix:
var handle = wm.open(url,'I want a name!', 'location=0, menubar=0, resizable=1, scrollbars=1, status=0, toolbar=0, width=' + width + 'px, height=' + height + 'px, top=' + top + 'px , left=' + left + 'px');

The name argument can not have a space in it so the regular expression needs \s
this.getName = function (url) {
name = getAbsolutePath(url);
return name.replace(/[:.\+\/\?\&\=\#\%\-\s]/g, "_").toLowerCase();
};