/*
 * jquery javascript plugin jquery.zoomimgrollover 0.9.0
 * http://bugsoftware.co.uk/jquery/
 *
 * copyright (c) 2010 ritchie comley
 * dual licensed under the mit and gpl licenses.
 *
 * date: 2010-01-19 (thu, 19 january 2010)
 * revision: 29
 *
 * dependencies:
 * jquery 1.4 (jquery.com)
 * 
 */

(function(jquery){ 

	jquery.fn.zoomimgrollover = function(options) {

		var defaults = {
			percent:30,
			duration:600
		}; 

		var opts = jquery.extend(defaults, options);
		
		// static zoom function
		function imagezoomstep(jzoomimage, x, origwidth, origheight)
		{
			var width = math.round(origwidth * (.5 + ((x * opts.percent) / 200))) * 2;
			var height = math.round(origheight * (.5 + ((x * opts.percent) / 200))) * 2;
				
			var left = (width - origwidth) / 2;
			var top = (height - origheight) / 2;
		
			jzoomimage.css({width:width, height:height, top:-top, left:-left});
		}

		return this.each(function()
		{
			var jzoomimage = jquery(this);
			var origwidth = jzoomimage.width();
			var origheight = jzoomimage.height();
			
			// add css ness. to allow zoom
			jzoomimage.css({position: "relative"});
			jzoomimage.parent().css({overflow: "hidden", display:"block", position: "relative", width: origwidth, height: origheight});
			
			jzoomimage.mouseover(function()
			{
				jzoomimage.stop().animate({dummy:1},{duration:opts.duration, step:function(x)
				{
					imagezoomstep(jzoomimage, x, origwidth, origheight)
				}});
			});

			jzoomimage.mouseout(function()
			{
				jzoomimage.stop().animate({dummy:0},{duration:opts.duration, step:function(x)
				{
					imagezoomstep(jzoomimage, x, origwidth, origheight)
				}});
			});
		});
	};

})(jquery);