Jquery Help, Set Image Size

Hello,

I am a begginer when it comes to javascript; however want to implement a jquery effect.

The tutorial i followed is:
[I]http://www.sohtanaka.com/web-design/fancy-thumbnail-hover-effect-w-jquery/[/I]

And i have managed to get that all working fine.
However, my images are all different sizes. And the code resets the width and height to a fixed value. Causing problems.

A user did make a comment fixing this problem, and a description of what they did:

To fix this to work with panoramic images, I did the following :
First, I removed the width and height declarations from zoomer.css for the image itself. I set those values manually using php’s getimagesize and aspect ratios to create the “thumbnail”

Next I added 2 variables owidth, and oheight directly under the line
$.fn.Zoomer = function (b) {
in zoomer.js.

Then in the addClass(“hover”) i changed width and height to :
width: ($(this).find(‘img’).attr(‘width’)*1.60),
height: ($(this).find(‘img’).attr(‘height’)*1.60),

and in the removeClass(“hover”) i changed width and height to:
width: owidth,
height: oheight,

I did it this way, because using height: ($(this).find(‘img’).attr(‘height’)/1.60),
was catching the value of another image when i moused over multiple images causing nasty scaling issues. Hope this helps someone.

Here is my code

HTML

<ul class="thumb">
        <li><a href="#"><img src="images/t1.png"/></a></li>
        <li><a href="#"><img src="images/t2.png"/></a></li>
        <li><a href="#"><img src="images/t3.png"/></a></li>
        <li><a href="#"><img src="images/t4.png"/></a></li>
        <li><a href="#"><img src="images/t5.png"/></a></li>
        <li><a href="#"><img src="images/t6.png"/></a></li>
        <li><a href="#"><img src="images/t7.png"/></a></li>
        </ul>
        <ul class="thumb">
        <li><a href="#"><img src="images/t8.png"/></a></li>
        <li><a href="#"><img src="images/t9.png"/></a></li>
        <li><a href="#"><img src="images/t10.png"/></a></li>
        <li><a href="#"><img src="images/t11.png"/></a></li>
        <li><a href="#"><img src="images/t12.png"/></a></li>
        <li><a href="#"><img src="images/t13.png"/></a></li>
        <li><a href="#"><img src="images/t14.png"/></a></li>
        <li><a href="#"><img src="images/t15.png"/></a></li>
        </ul>

JAVASCRIPT

<script type="text/javascript"> 
$(document).ready(function(){
 
//Larger thumbnail preview 
 
$("ul.thumb li").hover(function() {
	$(this).css({'z-index' : '10'}); /*Add a higher z-index value so this image stays on top*/ 
	$(this).find('img').addClass("hover").stop() /* Add class of "hover", then stop animation queue buildup*/
		.animate({
			marginTop: '-5px', /* The next 4 lines will vertically align this image */
			marginLeft: '15px',
			width: '0px', /* Set new width */
			height: '45px', /* Set new height */
			padding: '0px'
		}, 150); /* this value of "200" is the speed of how fast/slow this hover animates */

	} , function() {
	$(this).css({'z-index' : '0'}); /* Set z-index back to 0 */
	$(this).find('img').removeClass("hover").stop()  /* Remove the "hover" class , then stop animation queue buildup*/
		.animate({
			marginTop: '0', /* Set alignment back to default */
			marginLeft: '0',
			top: '0',
			left: '0',
			width: '30px', /* Set width back to default */
			height: '55px', /* Set height back to default */
			padding: '0px'
		}, 400);
});
 
//Swap Image on Click
	$("ul.thumb li a").click(function() {
		
		var mainImage = $(this).attr("href"); //Find Image Name
		$("#main_view img").attr({ src: mainImage });
		return false;		
	});
 
});
</script>

CSS

ul.thumb {
	float: left;
	position:relative;
	list-style: none;
	padding:0;
	margin:0;
}
ul.thumb li {
	float: left;
	position: relative;  /* Set the absolute positioning base coordinate */
	width: 30px;
	height: 55px;
}
ul.thumb li img {
	-ms-interpolation-mode: bicubic; /* IE Fix for Bicubic Scaling */
	position: absolute;
	left: 0; top: 0;
}
ul.thumb li img.hover {
	border: none; /* Get rid of border on hover */
}

Can anybody either help me write the code required or point me in the right direction.
Id appreciate any help

Kind Regards
Chris