1. Nice Titles revised
2. 40+ Tooltips Scripts With AJAX, JavaScript & CSS 
3. Pure CSS Tooltips
4. DHTML Goodies
5. Advanced Tooltip Control - ASP.NET AJAX
6. ASP.NET Tooltip control 
7. Tooltip a DIV through DOM/Javascript

if (!this.Page.IsClientScriptBlockRegistered("hideMessage"))

{ this.Page.RegisterStartupScript("hideMessage", 

	"<script>document.getElementById('" + pnlMessage.ClientID + "').style.display = 

				 'none'</script>;"); }

Examples 

<asp:Button ID="btnNewSearch" runat="server" OnClientClick="javascript:location.reload();" Text="New Search" />

or

<input type="button" value="Reload Page" onClick="window.location.reload()">

<input type="button" value="Reload Page" onClick="history.go(0)">

<input type="button" value="Reload Page" onClick="window.location.href">
 

To show a message box from the ASP.NET page code behind, we could try to ways:

1. When no Ajax is used:

   • Response.Write("<script>alert('The Class has been created.');</script>");

2. When Ajax is used:

   • ScriptManager.RegisterStartupScript(this, this.GetType(), "Key", String.Format("alert('The {0} Class has been approved.');", Detail.Title), true);

When using Reporting Services reports, if there was a need for a link to jump to another page in a new window target='_blank' (as the default behaviou is target='_top'), then we need to add the following java script to a report text box by right clicking the text box or control that has the url and then select the Navigation tab and then the select the Jump to URL radio button.

I was only able to get this working in Reporting Services 2005 without any issue, as it did not work with the 2000 version.  

 ="javascript: var f = window.open('" & Parameters!YourUrl.Value & "/Path/Default.aspx?ParameterID=" &   Parameters!Parameter1ID.Value & " ')"

 To register a js programmatically, use the following:Page.ClientScript.RegisterClientScriptInclude("script1", ResolveUrl("~/include/js/javascriptfile.js"));.

This can live behinde the master page inside the load event.

//Its better to check if the script was registered (Page.ClientScript.IsClientScriptBlockRegistered("script1")). 

Also, you can use another way if you have more script to register which in sequence:

      if(!IsPostBack && !Page.ClientScript.IsClientScriptBlockRegistered("URLs"))

        {

         StringBuilder scriptBuilder = new StringBuilder();

         scriptBuilder.Append("<script type='text/javascript' src='");    

         scriptBuilder.Append(ResolveUrl("~/include/js/mmloadmenus2.js"));

         scriptBuilder.Append("'></script>");        

         scriptBuilder.Append("<script type='text/javascript' src='");

         scriptBuilder.Append(ResolveUrl("~/include/js/mm_menu.js"));        

         scriptBuilder.Append("'></script>");

         scriptBuilder.Append("<script language='JavaScript1.2'>mmLoadMenus();</script>");

        Page.ClientScript.RegisterClientScriptBlock(typeof(System.String),"URLs",

        scriptBuilder.ToString());

   }

A javascript link can be used to call a javascript function as below: