Validations using Jquery in MVC3

say for required field for Username textbox.





function validate()
{
var txtValue = $('#txtUsername').val();

if (txtValue == '' || txtValue == null || txtValue == undefined)
{
alert ('Username is required.');
$('#dvUsernameMessage').html('Username is required.');
}
}

hello
on mvc we can not used server control for form validation we can used jquery function that it very light and easy understand.