function open_win(url_add, winh, winw)
   {
   NewWindow = window.open(url_add,'popup', 'width=' + winw + ',height=' + winh + ',menubar=no,status=no,location=no,resizable=no,toolbar=no,scrollbars=yes');
   NewWindow.focus();
   screen_height = window.screen.availHeight;
   screen_width = window.screen.availWidth;
   left_point = parseInt(screen_width/2)-( winw /2);
   top_point = parseInt(screen_height/2)-( winh /2);
   NewWindow.moveTo(left_point,top_point); 
   void(0); 
   }
   
   
function resize(height, width) {
window.resizeTo(width,height);
}