function validate_log(frm){ 
	   if(isEmpty(frm.frm_username.value)){
			alert("Please enter User name.");
			frm.frm_username.focus();
			return false;
	   }
	   if(!emailCheck(frm.frm_username.value)){
			frm.frm_username.focus();
			return false;
		}
	   if(isEmpty(frm.frm_password.value)){
			alert("Please enter Password.");
			frm.frm_password.focus();
			return false;
	  }
	 
	  return true;
   }