nn4 = document.layers;
ie4 = document.all;
nn6 = document.getElementById && !ie4;
			
function w(fileName, windowName, winWidth, winHeight){
	if (nn4 || ie4 || nn6){
		posX = Math.round((screen.width - winWidth) / 2);
		posY = Math.round((screen.height - winHeight) / 2);
		posCode = (nn4 || nn6)? "screenX="+posX+",screenY="+posY : "left="+posX+",top="+posY;
	}else{
		posCode = "";
	}
	newWindow = window.open(fileName,windowName,'menubar=no,toolbar=no,scrollbars=yes,status=yes,width='+winWidth+',height='+winHeight+','+posCode);
	newWindow.focus();
	return false;
}