function memloginvalidate()
{
   if(document.Login_form.username.value == "")
     {
        alert("Please enter your User Name.");
        document.Login_form.username.focus();
        return false;
     }
   if(document.Login_form.password.value == "")
     {
        alert("Please enter your Password.");
        document.Login_form.password.focus();
        return false;
     }
   }