pop up window with example

For pop up using Window.Open method you can find some good resources at :
1. http://www.tizag.com/javascriptT/javascriptpopups.php[^]
2. http://www.javascript-coder.com/window-popup/javascript-window-open.phtml[^]

You can also generate the code for your pop up depending on the requirements using some online Pop up Generators :
1. http://javascript.internet.com/generators/popup-window.html[^]
2. http://www.javascriptkit.com/popwin/index.shtml[^]

For some customised pop ups which provide more functionality you can refer to
1. Leightbox[^]
2. Lighbox[^]
3. Greybox[^]

These links explain the use of customised pop ups with example.

Hope this helps.
All the best.

Here you go: ASP.NET Popup Control[^]

Check for Css popup without opening a new window:
http://www.pat-burt.com/web-development/how-to-do-a-css-popup-without-opening-a-new-window/

<script type="text/javascript">
function viewblogs(url)
    {
    
var popupStyle = "dialogheight=300px;dialogwidth=450px;dialogleft:200px;dialogtop:200px;status:no;help:no;";
var var1 = window.showModalDialog(url,this, '', popupStyle);

    }
</script>

call this in code behind

string pageurl = "ViewBlogs.aspx";
Page.ClientScript.RegisterStartupScript(this.GetType(), "aa", "<script language='javascript'>viewblogs('" + pageurl + "');</script>");

still have any doubt reply me