Grabbing part of the url

[ZeroShade]

I need to grab a portion of my url (http://localhost:2592/Replies.aspx?ThreadId=124&DiscussionId=54). The portion I need is the 54 which is a query string. After I grab it I need to put it into a href (Threads.aspx?DiscussionId=). How can I go about this using javascript?

[ZeroShade]

Why doesn't this work?<script type="text/javascript"> function GoBack() { var discussionId = Request.QueryString(DiscussionId); document.write("Threads.aspx?DiscussionId=" + discussionId); } </script>

[jesh]

It doesn't work because the client doesn't have access to the server-side Request object. You'll either have to manually parse the string in javascript or wrap that Request.QueryString part in tags to tell the page to run that code at the server. Perhaps something like this:

<script type="text/javascript">		function GoBack()		{			var discussionId = <%=Request.QueryString("DiscussionId")%>;			document.write("Threads.aspx?DiscussionId=" + discussionId);		}</script>

Since it looks like you're using .NET, the better way would probably be to take care of all of that on the server:ASPX:

<asp:HyperLink id="ThreadLink" runat="server" Text="Read the Discussion" />

C# Code-behind:

ThreadLink.NavigateUrl = "Threads.aspx?DiscussionId=" + Request.QueryString["DiscussionId"];

[ZeroShade]

I guess I should of asked about the asp:HyperLink... would of saved me a lot of time. Now I know of it Thanks!!

[jesh]

You can also make most, if not all, of the traditional HTML tags runat server as well:

<a id="ThreadLink" runat="server">Read the Discussion</a>

ThreadLink.Href = "Threads.aspx?DiscussionId=" + Request.QueryString["DiscussionId"];