//from chandler via chris via mike

function prepRollovers() {
	var rollfound=0;

	if (document.getElementsByTagName) {

// grab all the images on a page

	for (z=0;z<document.getElementsByTagName("img").length;z++) {
		thisImg = document.getElementsByTagName("img")[z];

// check that its got the proper class
		if (thisImg.className !=null) { /* safari seems to break when these two tests are combined */
			if (thisImg.className.indexOf("roll") != -1) {
				rollfound++;

// define states, preload the image and attach the event handlers
				thisImg.out = new Image(); thisImg.out.src = thisImg.src;

//hacked by essl to use with gifs and jpegs not sure if this is the best way
				if(thisImg.src.toString().indexOf(".gif")!=-1) {
					thisImg.over = new Image(); thisImg.over.src = thisImg.src.toString().replace(/.gif/i,"_o.gif");
				 }
				if(thisImg.src.toString().indexOf(".jpg")!=-1) {
					thisImg.over = new Image(); thisImg.over.src = thisImg.src.toString().replace(/.jpg/i,"_o.jpg");
				 }					
				thisImg.parentNode.onmouseover = function () {
					this.getElementsByTagName("img")[0].src = this.getElementsByTagName("img")[0].over.src;
				};
				thisImg.parentNode.onmouseout = function () {
					this.getElementsByTagName("img")[0].src = this.getElementsByTagName("img")[0].out.src;
				};
			}
		}		
	}
}
}


//start the party right here - happens onload in body

function startit() {

//load the roll overs for class="roll"			
	prepRollovers();
				
}


function newImage(arg) {
	if (document.images) {
		rslt = new Image();
		rslt.src = arg;
		return rslt;
	}
}

function changeImages() {
	if (document.images && (preloadFlag == true)) {
		for (var i=0; i<changeImages.arguments.length; i+=2) {
			document[changeImages.arguments[i]].src = changeImages.arguments[i+1];
		}
	}
}