function HelpWindow(url) {
   window.open(url,'pop_window','toolbar=no,menubar=no,location=no,scrollbars=yes,height=500,width=850,resizable=yes,left=80,top=80');
} 

function setButton(btnID, chkBoxID){

  if (document.getElementById(chkBoxID).checked==true){
    document.getElementById(btnID).disabled=false;
  }
  else {
    document.getElementById(btnID).disabled=true;
  }
}