Autohide Text Box When A Particular Option Is Selected From Combo

I have one combo box which displays a text box when 2nd or 3rd option is selected, but how to hide that text box when first option is selected? $('#combo').change(function () {

Solution 1:

Do you really need server side? Here an example without:

$("#combo").change(function () {
    if (this.value != '_') {  
        $("#textbox").empty().append("<input type='text' id='text1'/>");
    }
    else {
        $("#textbox").hide();
    }
});

Also see this example.

But if really need server side, you have to set isTrue conditionally.

Solution 2:

following is the code to hide

 $('#textbox').hide();