function popup(url,width,height,title) {
       if(height == undefined) {
           height = 420;
       }
       if(width == undefined) {
           width = 420;
       }
       if(title == undefined) {
           title = 'Information';
       }
       window.open(url,title,'scrollbars=1,resizable=1,width='+width+',height='+height+',top='+screen.availTop+',left='+screen.availLeft);
    }

  function printpage()
  {
    if (window.print) window.print();
    else alert('This script does not work in your browser.  Please select File -> Print to print manually');
  }