hello frnd
you try like that.
function addRow()
{
var count=$('#getcount').val();
var row='<tr><td><input type="text" name="txtName['+count+']" class="frm required" /></td><td><input type="text" name="txtUName['+count+']" class="frm required email" /></td><td><input type="password" name="txtPass['+count+']" class="frm required" /></td> <td> <select name="usertype['+count+']" class="selc" datasourceid="ObjectDataSource1" datatextfield="UserType" datavaluefield="ID"></select></td><td> </td></tr>';
$('#myTable').innerHTML+=row;
setcount(parseInt(count)+1);
}