function selectAll(formObj, isInverse) 
{
   for (var i=0;i < formObj.length;i++) 
   {
      fldObj = formObj.elements[i];
      if (fldObj.type == 'checkbox')
      { 
         if(isInverse)
            	fldObj.checked = false;
         else 
         	fldObj.checked = true; 
       }
   }
}