function searchtext()
{
    window.location="Search.aspx?qry=" + document.getElementById('searchtxt').value;
}

function KeyDownSearch()
{

    // process only the Enter key
    if (event.keyCode == 13)
    {
        // cancel the default submit
        event.returnValue=false;
        event.cancel = true;
        // submit the form by programmatically clicking the specified button

        searchtext();
    }
}