一个不错的用JavaScript实现的UBB编码函数

function JsUBB(str)
{
var re=//[i/]http://www.jb51.net/article/(.[^/[]*)/[//i/]/gi;
str=str.replace(re,"<i>$1</i>"); //斜体字
re=//[b/]http://www.jb51.net/article/(.[^/[]*)/[//b/]/gi;
str=str.replace(re,"<b>$1</b>"); //粗体字
re=//[u/]http://www.jb51.net/article/(.[^/[]*)/[//u/]/gi;
str=str.replace(re,"<u>$1</u>"); //下划线
re=//[color=http://www.jb51.net/article/(.[^/[]*)/]http://www.jb51.net/article/(.[^/[]*)/[//color/]/gi;
str=str.replace(re,"<font color=$1>$2</font>"); //字体颜色
re=//[size=([1-7])/]http://www.jb51.net/article/(.[^/[]*)/[//size/]/gi;
str=str.replace(re,"<font size=$1>$2</font>"); //字体大小
re=//[face=http://www.jb51.net/article/(.[^/[]*)/]http://www.jb51.net/article/(.[^/[]*)/[//face/]/gi;
str=str.replace(re,"<font face=$1>$2</font>"); //字体

re=//[center/]http://www.jb51.net/article/(.[^/[]*)/[//center/]/gi;
str=str.replace(re,"<div align='center'>$1</div>"); //居中
re=//[right/]http://www.jb51.net/article/(.[^/[]*)/[//right/]/gi;
str=str.replace(re,"<div align='right'>$1</div>"); //右对齐
re=//[quote/]http://www.jb51.net/article/(.[^/[]*)/[//quote/]/gi; //引用
str=str.replace(re,"<table bgcolor='#E6FFE6' width='90%' style='border:1px #009900 dotted' align='center'><tr><td class='td1'>$1</td></tr></table>");

re=//[fly/](.*)/[//fly/]/gi; //飞行
str=str.replace(re,"<marquee width=90% behavior=alternate scrollamount=3>$1</marquee>");
re=//[move/](.*)/[//move/]/gi; //移动
str=str.replace(re,"<MARQUEE scrollamount=3>$1</marquee>");
re=//[SHADOW=*([0-9]*),*(#*[a-z0-9]*),*([0-9]*)/]http://www.jb51.net/article/(.[^/[]*)/[//SHADOW]/gi; //阴影
str=str.replace(re,"<table width=$1><tr><td style='filter:shadow(color=$2, strength=$3)'>$4</td></tr></table>");
re=//[GLOW=*([0-9]*),*(#*[a-z0-9]*),*([0-9]*)/]http://www.jb51.net/article/(.[^/[]*)/[//GLOW]/gi; //外发光
str=str.replace(re,"<table width=$1 ><tr><td style='filter:glow(color=$2, strength=$3)'>$4</td></tr></table>")

re=//[URL/]http://www.jb51.net/article/(.[^/[]*)/[//URL/]/gi;
str=str.replace(re,"<a href='$1' target=_blank>$1</a>"); //超链接1
re=//[URL=http://www.jb51.net/article/(.[^/[]*)/]http://www.jb51.net/article/(.[^/[]*)/[//URL/]/gi;
str=str.replace(re,"<a href='$1' target=_blank>$2</a>"); //超链接2

re=//[EMAIL/]([/w-]+(/.[/w-]+)*@[/w-]+(/.[/w-]+)+)/[//EMAIL/]/gi;
str=str.replace(re,"<a href='mailto:$1'>$1</a>"); //电子邮件链接1
re=//[EMAIL=([/w-]+(/.[/w-]+)*@[/w-]+(/.[/w-]+)+)/]http://www.jb51.net/article/(.[^/[]*)/[//EMAIL/]/gi;
str=str.replace(re,"<a href='mailto:$1'>$4</a>"); //电子邮件链接2

re=//[img/]http://www.jb51.net/article/(.[^/[]*)/[//img/]/gi;
str=str.replace(re,"<a href='$1' target=_blank><img src='$1' border='0' alt='单击在新窗口浏览'></a>"); //图片
re=/:em(/d{1,}):/gi;
str=str.replace(re,"<img src='emot/$1.gif' border='0'>"); //表情图标
return str;
}