function ValidateFields(form){
	 var error_condition = 0;
   document.getElementById("user_login").className = "";
   document.getElementById("user_login_label").className = "";
   document.getElementById("user_pwd").className = "";
   document.getElementById("user_password_label").className = "";
   if(trim(form.user_login.value)==""){
      error_condition = 1;
      document.getElementById("user_login").className = "error";
      document.getElementById("user_login_label").className = "error";
   }
   if(trim(form.user_pwd.value)==""){
      error_condition = 1;
      document.getElementById("user_pwd").className = "error";
      document.getElementById("user_password_label").className = "error";
   }
   if ( error_condition ) {
   	  alert ( "Please correct the items highlighted in red." );
   	  return false;
   } else {
      return true;
   }
}
function trim(stringToTrim) {
	 return stringToTrim.replace(/^\s+|\s+$/g,"");
}