Question

If I pass a ClientID to a javascript function as a parameter without including the single quotes around it, it gets passed as a reference to the control itself which can then be used without first calling getElementByID.

I can’t find this behaviour documented anywhere, is this a browser specific thing or a .net thing or what?

I am setting up the call like this in code-behind…

protected void Page_Load(object sender, EventArgs e)         {             Button1.Attributes.Add('onClick', string.Format('showvalue({0})',  TextBox1.ClientID));         } 

My concern is that this may not work in older versions of IE. Thanks.

Answer 1

Add quotes around your ID value when you generate the JS code e.g: string.Format(‘showvalue(‘{0}‘)’, TextBox1.ClientID)

Without quotes, showValue gets an instance of the global variable with your ClientID name that usually is the DOM element your control rendered.