// browser detection

	var agt = navigator.userAgent.toLowerCase();
	
	// Internet Explorer
	var is_ie    = ((agt.indexOf("msie") != -1) && (agt.indexOf("opera") == -1));
	// Mozilla, Firefox et. al
	var is_moz   = ((agt.indexOf("gecko") != -1) && (agt.indexOf("khtml") == -1));
	// Safari, Konqueror
	var is_khtml = (agt.indexOf("khtml") != -1);
	// Opera
	var is_opera = (agt.indexOf("opera") != -1);

// initializes on page load.
// - sets rollovers for categories on home page
	window.onload = function () {
		var imgLinks = document.getElementsByTagName('img');
		for (var i = 0; i <= imgLinks.length - 1; i++) {
			if (imgLinks[i].className.indexOf("rollover") != -1) {
				imgLinks[i].onmouseover = new Function('mouseOver(this.id)');
				imgLinks[i].onmouseout = new Function('mouseOut(this.id)');
			}
		}
	}


// rollovers

var IMAGE_PATH = "images/";

	function mouseOver(id) {
		var theImg = document.getElementById(id);
		theImg.src = IMAGE_PATH + "g_" + id +"_o." + theImg.src.substring(theImg.src.length-3);
	}
	
	function mouseOut(id) {
		var theImg = document.getElementById(id);
		theImg.src = IMAGE_PATH + "g_" + id +"." + theImg.src.substring(theImg.src.length-3);
	}