function login() {
  var loginForm = document.getElementById("loginForm");
  	if (loginForm.username.value == "") {
    	alert("Please enter your user name.");
      return false;
    }
    if (loginForm.password.value == "") {
    	alert("Please enter your password.");
      return false;
    }
    var submitForm = document.getElementById("submitForm");
   	submitForm.username.value = loginForm.username.value;
    submitForm.response.value = hex_md5(loginForm.password.value);
    submitForm.submit();
		    }