check form af 2 x password

jeg benytter iøjeblikke undertegnede script, men jeg vil gerne ha at den checker password1 og password2 = hinanden nogen der kan hjælpe mig, skal bruger til IE og firefox.


<script language=\"JavaScript\" type=\"text/JavaScript\">

function isEmpty(string) {
return !/\S+/.test(string);
}

function validate(form) {
var controls = form.elements;

/* Requiring only one of either state or zip code seemed
* rather odd (though I'm not an American, admittedly), so
* the code below doesn't follow the original logic.
*/
if (isEmpty(controls.oldpassword.value)) {
alert('Please enter the current password');
return false;
}
if (isEmpty(controls.password1.value)) {
alert('Please enter new password');
return false;
}
if (isEmpty(controls.password2.value)) {
alert('Please retype password');
return false;
}
return true;
}
</script>