onClick and onClientClick event used together. Does not Work in Internet Explorer

Question

Java script code:

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

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

Button Code

<asp:Button ID="btnPost"  UseSubmitBehavior="false"  Text="Post" OnClientClick="javascript:validateLoginForm();" runat="server" OnClick="btnPost_Click"  />

This code is not working on internet explorer but works fine in firefox even though the javascript returns false in onClientClick event the onClick event is still getting called Please Help...!!!

Answer 1

它可以使用

<asp:Button ID="btnPost"  UseSubmitBehavior="false"  Text="Post" OnClientClick="return validateLoginForm();" runat="server" OnClick="btnPost_Click"  />

Answer 2

Replace your Java script function with this

function validateLoginForm() {
        if (document.getElementById("<%=txtTitle.ClientID%>").value == "") {

            alert("Please Enter Title");
            txtTitle.focus();
            return false;
        }
        else
            return true;
}

And you OnClientClick attribute with this

OnClientClick="javascript:return validateLoginForm();"