if you do want to use Javascript validation:
@Html.TextBoxFor(m=>m.userid,new {id="userid"})
JS:
$(#submit).click(function()
{
var data=$("#userid").val();
if(data.length==0)
{
alert("Please enter user id");
return false;
}
});
If you want to use data annotations
for your model for validation just use [Required]
attribute for your
field userid