onClick和onClientClick事件一起使用。在Internet Explorer中不起作用

Java script code:

Java脚本代码：

<script language="javascript" type="text/javascript">
    function validateLoginForm() {
        if (document.getElementById("<%=txtTitle.ClientID%>").value == "") {

            alert("Please Enter Title");
            txtTitle.focus();
            return false;
        }
}
<script languag