<!--

function PopupScreenCentre(url,name,width,height) {

	var titleBarHeight, windowBorderWidth
	titleBarHeight = 24;
	windowBorderWidth = 4;

	var screenWidth, screenHeight
	screenWidth = 800;
	screenHeight = 600;

	if (window.screen) {
		if (window.screen.availWidth) {			
			screenWidth = window.screen.availWidth;
			screenHeight = window.screen.availHeight;
		}
	}

	var windowWidth = windowBorderWidth + width + windowBorderWidth;
	var windowHeight = titleBarHeight + height + windowBorderWidth;

	var left = (screenWidth - windowWidth) / 2;
	var top = (screenHeight - windowHeight) / 2;

	window.open(url,name,'left='+left+',top='+top+',screenX='+left+',screenY='+top+',width='+width+',height='+height+',scrollbars=0,resizable=0,toolbar=0,location=0,directories=0,status=0,menubar=0,copyhistory=0');
}

//-->