function OpenWindows(url, widths, heights, names){
	var topsize = (screen.height - heights) / 2;
	var leftsize = (screen.width - widths) / 2;
	OpenPOPWINDOWS = window.open(url, names, "width="+widths+", height="+heights+", top="+topsize+", left="+leftsize);
	OpenPOPWINDOWS.focus();
}