var scWidth = screen.width;
var scHeight = screen.height;

function openWindow(urlLocation, windowName, windowWidth, windowHeight, windowPosition)
	{
	var windowWidth = (arguments[2] > 0)?arguments[2]:660;
	var windowHeight = (arguments[3] > 0)?arguments[3]:520;
	var leftPos = (scWidth - windowWidth)/2;
	var topPos = (scHeight - windowHeight)/2;
	newWindow = window.open(urlLocation, windowName, "toolbar=0, location=1, menubar=0, scrollbars=1, resizable=1, left=" + leftPos + ", top=" + topPos + ", width=" + windowWidth + ",  height=" + windowHeight + "");
	newWindow.focus();
	}