首先，html代码：

<div style="display:none;"><iframe id="compareIframe" src=""></iframe></div>

js代码：

var compareContent=”你要改变的值";

if (compareContent != "") {

                        document.getElementById("compareIframe").src = "ajax/changeSession.aspx?compareInfo=" +compareContent;

}

 

ajax:

changeSession.aspx.cs

protected void Page_Load(object sender, EventArgs e)

    {

        Session["compare"] = Request.QueryString["compareInfo"];

    }

//end

 

//<a href=””></a>