javascript - How to set default value for HTML select?

I have a HTML select like this:

    a
    b
    c

and I have a variable named temp in my JavaScript:

var temp = "a";

Now I want to set the value of the option that is equal to temp as default value for my select.

How can I do it?

Answer

$(function() {
    var temp="a"; 
    $("#MySelect").val(temp);

});


    a
    b
    c