JS相关

/**
 * wrap javascript codes with a html-tag
 * @author Wilson Zeng
 */
function js($script){
    return '<script type="text/javascript">'."\n".$script."\n".'</script>'."\n";
}

/**
 * wrap javascript codes with a html-tag & history back
 * @author Wilson Zeng
 * @param $message [optional] show alert() if is given
 * @param $url [optional] the next step that will jump to if is given
 * @author Wilson Zeng
 */
function jsBack($message = NULL, $url = NULL, $addslashes = TRUE){
    $script = '';
    if($message){
        $script .= 'alert("'.str_replace('"', '\"', ($addslashes ? addslashes($message) : $message)).'");';
    }
    $script .= $url ? 'location.href="'.$url.'";' : 'history.back();';

    echo js($script);
    exit(0);
}