function rollOver(targetObj){
	if(targetObj != 'undefined'){
		if(targetObj.src_rollover = 'undefined'){
			// set the original image name
			targetObj.src_original = targetObj.src;
			var src_temp = targetObj.src_original.split(".");
			// add a "b" to the end of the filename
			src_temp[(src_temp.length)-2] = src_temp[(src_temp.length)-2]+"_b";
			// set the rollover image name
			targetObj.src_rollover = src_temp.join(".");
		}
		targetObj.src = targetObj.src_rollover;
	}
	document.body.style.cursor='pointer';
}

function rollOut(targetObj){
	if(targetObj != 'undefined'){
		targetObj.src = targetObj.src_original;
	}
	document.body.style.cursor='auto';
}
					
					
/*
testImage();
function testImage(URL) {
    var tester=new Image();
    tester.onLoad=isGood;
    tester.onError=isBad;
    tester.src=URL;
}

function isGood() {
    alert('That image exists!');
}

function isBad() {
    alert('That image does no exist!');
}
*/

// globals
//var