Question

I am puzzled why this return false doesn’t cancel the post-back.

 function validate() {
         return false;
        }



 <asp:Button ID="Button1" type="submit" OnClientClick="validate();" runat="server" Text="send"  />

The most crazy part is that the code below DOES cancel the postback, but I need this to happen in the function like above:

 <asp:Button ID="Button1" type="submit" OnClientClick="return false;" runat="server" Text="send" style="margin-right:150px;" />

Answer 1

Try returning the value from your function, like this

<asp:Button ID="Button1" type="submit" OnClientClick="return validate();" runat="server" Text="send"  />

Otherwise you are just executing a javascript function that returns a boolean.