几种Jquery给Select赋值的方法

<span style="font-size:12px;">    <span style="font-family:SimSun;">$(document).ready(function () {  
        $("#AreaSelect").attr("value", area);  
        $("#AreaSelect").val(area);  
        $("#AreaSelect option[value='" + area + "']").attr("selected", true);  
        $("#AreaSelect ").val(area);  
    });</span></span>