In the OnClientClick property you have set:
OnClientClick="openWin(winContact); return false;"
Since you haven't defined winContact before, the framework will throw an error. I assume that you wish to open the RadWindow with ID "winContact", am I right? If this is so, you need to set the argument as a string
OnClientClick="openWin('winContact'); return false;" //note the single quotes
And then to set your openWin function like this:
var oWnd = GetRadWindowManager().GetWindowByName(winName);
I hope this helps. Note that the GetRadWindow function is not used - this function is intended to be used in content pages only, when you want to refer the RadWindow in which this page was shown.
More information on the subject and code snippets can be found in the documentation, section Controls / RadWindow / Programming.
the Telerik team