function popupWin(page,w,h) 
{ 
var options = 'toolbar=0,status=0,menubar=0,scrollbars=0,resizable=0,WIDTH='+w+',HEIGHT='+h+',Left=' + (screen.width-w)/2 + ',Top=' + (screen.height-h)/2;
var newwindow=window.open(page,'mywindow', options);
}