var dialog = new Object()
function OpenHelp() {
    if (!dialog.win || (dialog.win && dialog.win.closed)) {
        dialog.win = window.open('/shipping', 'help', 'top=100,left=100,width=600,height=600,menubar=no,scrollbars=yes,status=no,resizable=yes')
        dialog.win.focus()
    }
    else {
        dialog.win.focus()
    }
}