Register client script when using Update panel

Page.RegisterClientScriptBlock(string key,string script) will not work if control is inside the update panel. To solve this problem we need to use
ScriptManager.RegisterClientScriptBlock(Control,Type,string key,string script,bool addScriptTags);
Let us take an example suppose a Datalist named "dtalistNames" is in updatepanel and we need to register the script in Datalist's item command event. Then use following text to alert a message.
C# syntax.
string Message="";
Message="";
ScriptManager.RegisterClientScriptBlock(this, this.GetType(), "mess", Message, false);