function dspColorThumb(url){
	var txtUrl = url.src;
	if(txtUrl.substr(-5) != 'b.jpg'){
		var lastSlashLoc = txtUrl.lastIndexOf("/");
		var lastDotLoc = txtUrl.lastIndexOf(".");
		var pathToFile = txtUrl.substr(0, lastSlashLoc+1);
		var filenameLength = lastDotLoc - lastSlashLoc;
		var filename = txtUrl.substr(lastSlashLoc+1, filenameLength-1);
		var extension = "b.jpg";
		url.src = pathToFile + filename + extension;
	}
}
function dspBnwThumb(url){
	var txtUrl = url.src;
	var lastSlashLoc = txtUrl.lastIndexOf("/");
	var lastDotLoc = txtUrl.lastIndexOf(".");
	var pathToFile = txtUrl.substr(0, lastSlashLoc+1);
	var filenameLength = lastDotLoc - lastSlashLoc;
	var filename = txtUrl.substr(lastSlashLoc+1, filenameLength-2);
	var extension = ".jpg";
	url.src = pathToFile + filename + extension;
}