function openinwindow(urla,widtha,heighta) {
var Win = window.open(""+urla+"","Popup",'width='+widtha+',height='+heighta+',toolbar=no, location=no, status=no, directories=no, copyhistory=no, resizable=no,scrollbars=no,menubar=no, left='+(screen.width-widtha)/2+',top='+(screen.height-heighta)/2+'');
}