function s_popup(poppage, width, height, strWindowName) {
	var popW = width, popH = height;

	var LeftPosition = (screen.width) ? (screen.width-popW)/2 : 0;
	var TopPosition = (screen.height) ? (screen.height-popH)/2 : 0;
	
	var windowName = typeof(strWindowName) == "undefined" ? "popup" : strWindowName;
	
	window.open(poppage, strWindowName,"width="+popW+",height="+popH+",top="+TopPosition+",left="+LeftPosition+",toolbar=no,location=no,status=no,menubar=no,scrollbars=yes,resizable=yes");

}