function test()

    {

        var FCK = FCKeditorAPI.GetInstance('<%=FCKeditor1.ClientID %>') ; FCK.InsertHtml('{u_mergefield}'); delete FCK; newwin=window.open('Selection.aspx',null,"left=300,top=100,height=200,width=200,status=yes,titlebar=no,toolbar=no,menubar=no,location=no"); newwin.focus();

    }