如何在asp.net中动态创建文本框中调用javascript ?

 // Assign Context-Menu to Control
    $(function () {
        var txt1 = "#" + "<%= **myCal**.ClientID %>";

        // Attach Context-Menu to Control
        $(txt1).contextMenu(ctxtMenu, { theme: 'vista' });
    });
 // Assign Context-Menu to Control
    $(functi