请教如何在页面首次加载时就出发ajax请求？

[ksr12333]

使用微软那个ajax组件，如何在page_load的时候就能发出ajax请求，使得页面异步加载？谢谢解答

[孟子E章]

public void Page_Load(Object sender, EventArgs e)
{
// Define the name and type of the client scripts on the page.
String csname1 = "PopupScript";
Type cstype = this.GetType();

// Get a ClientScriptManager reference from the Page class.
ClientScriptManager cs = Page.ClientScript;

// Check to see if the startup script is already registered.
if (!cs.IsStartupScriptRegistered(cstype, csname1))
{
StringBuilder cstext1 = new StringBuilder();
cstext1.Append("<script type=text/javascript>doAjax()</");
cstext1.Append("script>");

cs.RegisterStartupScript(cstype, csname1, cstext1.ToString());
}

[wuyq11]

$.ajax({
type:"GET",
url:"="+new Date(),
data:"",
success:function(text){
$("#str").text(text);
}
});
$(document).ready(function()

[ksr12333]

可能我没说明白，我是想让updatepanel能够起作用，在page_load的时候 期待高手的解答，谢谢了