function CheckAllBoxes(theform) {
  for (var i = 0; i < theform.length; i++) {
       var e = theform.elements[i];
       if( e.type =="checkbox") {
         e.checked = true;
         continue;
       }  
  }
}
function UnCheckAllBoxes(theform) {
  for (var i = 0; i < theform.length; i++) {
       var e = theform.elements[i];
       if( e.type =="checkbox") {
         e.checked = false;
         continue;
       }  
  }
}