function popWin (url,name,w,h)
{
	var l = (screen.width-w)/2;
  	var t = (screen.height-h)/2;
  	var opt = "width="+w+",height="+h+",top="+t+",left="+l+",statusbar=0,scrollbars=0";
	newWin = open(url,name,opt);
}