Call JavaScript function from ASP.Net Button Click

Hi nauna,

Refer below code.

HTML

<script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.9.1/jquery.min.js"></script>
<script type="text/javascript">
    function Validate() {
        $("div[class=loadpost]").each(function (index) {
            var textbox1 = $(this).find('[id*=TextBox3]').val();
            if (textbox1 != '') {
                var destination = $(this).find('[id*=TextBox4]').val();
                var length = $(this).find('[id*=TextBox6]').val();
                var weight = $(this).find('[id*=TextBox7]').val();
                if (destination == '' || length == '' || weight == '') {
                    alert("Destination, Weight,Length. min one equipment type is required field is required on rows " + (index + 1));
                }

                else {
                    document.getElementById("<%=Button2.ClientID %>").click();
                    alert("success " + (index + 1));
                }
            }
        });
        return false;
    }
</script>
<asp:Button ID="Button2" Text="Upload" runat="server" OnClientClick="Validate()" />