< html xmlns="http://www.w3.org/1999/xhtml" >
< head runat="server" >
< title > Untitled Page< /title >
< script >
function test11()
{
var t1=document.getElementById("Txt1").value.length;
if (t1==10)
{
alert('10 Characters only allowed');
return false;
}
}
< /script >
< /head >
< body >
< form id="form1" runat="server" >
< textarea id="Txt1" onkeydown ="return test11();" >
< /textarea >
< /form >
< /body >
< /html >