master page problem with javascript

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I am not able to call function from javascript..on the masterPage.
Acctually i have a button and textbox.I am doing validation on each page that are integrated with master page but i am not able to do this..

I am try as like this....

On Masster page..

XML

<script type="text/javascript">
function ValidateTextBox()
{
    var Text = document.getElementById('<%=txtkey.ClientID %>');

    if(Text.value == "")
    {
        alert('Please enter at least one key skill..');
        return false;
    }

}
</script>

and on button also in Master Page-----

XML

<form>
<div>
<body>

<asp:ImageButton ID="ImageButton1" runat="server" ImageUrl="~/Images/search_btn.png" onclick="ImageButton1_Click" CausesValidation="False" OnClientClick="return ValidateTextBox()" />
</form>

</body>

Posted 29-Aug-12 0:19am

Raju2049

Updated 29-Aug-12 0:48am

v3

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Darkness_07 · Answer 1 · 2012-08-29T00:39:00

Quote:
<script type="text/javascript">
function ValidateTextBox()
{
var Text = document.getElementById('<%=txtkey.ClientID %>');

if(Text.value == "")
{
alert('Please enter at least one key skill..');
return false;
}else{
return true;
}
}
</script>

Quote:
<form>

<body>

<asp:imagebutton id="ImageButton1" runat="server" imageurl="~/Images/search_btn.png" onclick="ImageButton1_Click" causesvalidation="False" onclientclick="return ValidateTextBox();"/>
</form>

</body>

Try this!
Hope it will Help!.