Front-end js changes the value of Session (implemented with ajax)_javascript skills

First, the html code :

Copy the code The code is as follows:

< ;div style="display:none;">

js code :

Copy code The code is as follows:

var compareContent=”What you want to change value";
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
//