UBB转HTML和HTML转UBB脚本

function htmlToubb(h,u){  
    str = pattern(document.getElementById(h).value);  
    document.getElementById(u).value=str;  
}  
  
function ubbTohtml(u,h){  
    str = up(document.getElementById(u).value);  
    document.getElementById(h).value=str;  
}  
  
function pattern(str){  
    str = str.replace(/<br[^>]*>/ig,'\n');  
    str = str.replace(/<p[^>\/]*\/>/ig,'\n');  
    str = str.replace(/\son[\w]{3,16}\s?=\s*([\'\"]).+?\1/ig,'');  
    str = str.replace(/<hr[^>]*>/ig,'[hr]');  
    str = str.replace(/<(sub|sup|u|strike|b|i|pre)>/ig,'[$1]');  
    str = str.replace(/<\/(sub|sup|u|strike|b|i|pre)>/ig,'[/$1]');  
    str = str.replace(/<(\/)?strong>/ig,'[$1b]');  
    str = str.replace(/<(\/)?em>/ig,'[$1i]');  
    str = str.replace(/<(\/)?blockquote([^>]*)>/ig,'[$1blockquote]');  
    str = str.replace(/<img[^>]*smile=\"(\d+)\"[^>]*>/ig,'[s:$1]');  
    str = str.replace(/<img[^>]*src=[\'\"\s]*([^\s\'\"]+)[^>]*>/ig,'[img]'+'$1'+'[/img]');  
    str = str.replace(/<a[^>]*href=[\'\"\s]*([^\s\'\"]*)[^>]*>(.+?)<\/a>/ig,'[url=$1]'+'$2'+'[/url]');  
    str = str.replace(/<[^>]*?>/ig, '');  
    str = str.replace(/&amp;/ig, '&');  
    str = str.replace(/&lt;/ig, '<');  
    str = str.replace(/&gt;/ig, '>');  
    return str;  
}  
  
function up(str){  
    str = str.replace(/</ig,'&lt;');  
    str = str.replace(/>/ig,'&gt;');  
    str = str.replace(/\n/ig,'<br />');  
    str = str.replace(/\[code\](.+?)\[\/code\]/ig, function($1, $2) {return phpcode($2);});  
    str = str.replace(/\[hr\]/ig,'<hr />');  
    str = str.replace(/\[\/(size|color|font|backcolor)\]/ig,'</font>');  
    str = str.replace(/\[(sub|sup|u|i|strike|b|blockquote|li)\]/ig,'<$1>');  
    str = str.replace(/\[\/(sub|sup|u|i|strike|b|blockquote|li)\]/ig,'</$1>');  
    str = str.replace(/\[\/align\]/ig,'</p>');  
    str = str.replace(/\[(\/)?h([1-6])\]/ig,'<$1h$2>');  
    str = str.replace(/\[align=(left|center|right|justify)\]/ig,'<p align="$1">');  
    str = str.replace(/\[size=(\d+?)\]/ig,'<font size="$1">');  
    str = str.replace(/\[color=([^\[\<]+?)\]/ig, '<font color="$1">');  
    str = str.replace(/\[backcolor=([^\[\<]+?)\]/ig, '<font style="background-color:$1">');  
    str = str.replace(/\[font=([^\[\<]+?)\]/ig, '<font face="$1">');  
    str = str.replace(/\[list=(a|A|1)\](.+?)\[\/list\]/ig,'<ol type="$1">$2</ol>');  
    str = str.replace(/\[(\/)?list\]/ig,'<$1ul>');  
    str = str.replace(/\[s:(\d+)\]/ig,function($1,$2){ return smilepath($2);});  
    str = str.replace(/\[img\]([^\[]*)\[\/img\]/ig,'<img src="$1" border="0" />');  
    str = str.replace(/\[url=([^\]]+)\]([^\[]+)\[\/url\]/ig, '<a href="$1">'+'$2'+'</a>');  
    str = str.replace(/\[url\]([^\[]+)\[\/url\]/ig, '<a href="$1">'+'$1'+'</a>');  
    return str;  
}  

在实际应用中 如超链接的转换 UBB 转 <A>

re=/\[url=([^\]]+)\]([^\[]*)\[\/url\]/ig;
            str = str.replace(re,function($0,$1,$2){
                    if($2){
                        return '<a href='+$1+' target=_blank>'+$2+'</a>';
                    }
                    else{
                        //没有输入链接描述时 链接地址即为描述
                      return '<a href='+$1+' target=_blank>'+$1+'</a>';
                    }
                });

<A>转UBB

re =/<a[^>]*href=[\'\"\s]*([^\s\'\"]*)[^>]*>(.+?)<\/a>/ig;
        str = str.replace(re,function ($0,$1,$2){
            if($1==$2){
                return '[url='+$1+'][/url]';
            }
            else{
                return '[url='+$1+']'+$2+'[/url]';
            }
        });