function popupWindow(url) {
  window.open(url,'popupWindow','toolbar=no,location=no,directories=no,status=no,menubar=no,scrollbars=no,resizable=yes,copyhistory=no,width=100,height=100,screenX=150,screenY=150,top=150,left=150')
}

function popupWindow2(url) {
  window.open(url,'popupWindow','toolbar=no,location=no,directories=no,status=no,menubar=no,scrollbars=yes,resizable=yes,copyhistory=no,width=600,height=300,screenX=150,screenY=150,top=150,left=150')
}

function no_error()
{ return true; }
window.onerror=no_error;

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];
		}
	}
}

var preloadFlag = false;
function preloadImages() {
	if (document.images) {
		sts_01_sts_02_over = newImage("images/sts_01-sts_02_over.gif");
		sts_02_over = newImage("images/sts_02-over.gif");
		sts_03_over = newImage("images/sts_03-over.gif");
		sts_04_over = newImage("images/sts_04-over.gif");
		sts_05_over = newImage("images/sts_05-over.gif");
		sts_18_over = newImage("images/sts_18-over.gif");
		sts_19_over = newImage("images/sts_19-over.gif");
		sts_20_over = newImage("images/sts_20-over.gif");
		sts_21_over = newImage("images/sts_21-over.gif");
		preloadFlag = true;
	}
}