if (document.images) {
	home_on = new Image(); home_on.src="images/home_on.gif";
	home_off = new Image(); home_off.src="images/home_off.gif";
	aboutmon_on = new Image(); aboutmon_on.src="images/aboutmon_on.gif";
	aboutmon_off = new Image(); aboutmon_off.src="images/aboutmon_off.gif";

	classes_on = new Image(); classes_on.src="images/classes_on.gif";
	classes_off = new Image(); classes_off.src="images/classes_off.gif";
	}  
       
function roll_over(imgName) {
            if (document.images) {
            imgOn = eval(imgName + "_on.src");
            document [imgName].src = imgOn;
            }
    }

function roll_out(imgName) {
            if (document.images) {
            imgOff = eval(imgName + "_off.src");
            document [imgName].src = imgOff;
            }
    }

function bar(message)
{
   window.status = message
   return true
}

function openWin(URL)
{
aWindow = window.open(URL, "legendwindow","width=350,height=350,scrollbars=no,status=no,menubar=no,resizeable=no");
}