--jquery--
var tr = $("#tbllist tr");
var count= tr.length;
alert(count);
and Covered my listview with table as shown below:
<table id="tbllist">
<listview>
<tr></tr> //in this tr i specified column names using <asp:localize>
</listview>
</table>
and included this line in HEAD
<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.10.2/jquery.min.js" type="text/jscript"> </script>
Now I'm Getting my output