来一段js里面html代码转换ubb代码的函数

以下代码适合将html代码转换成通用的ubb代码，支持批量替换哟，试试吧

function htmltoubb(str){
//str = str.replace(/(\r\n|\n|\r)/ig, '');
str = str.replace(/<br[^>]*>/ig,'\n');
str = str.replace(/<p[^>\/]*\/>/ig,'\n');
//str = str.replace(/\[code\](.+?)\[\/code\]/ig, function($1, $2) {return phpcode($2);});
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(/<h([1-6]+)([^>]*)>(.*?)<\/h\1>/ig,function($1,$2,$3,$4){return h($3,$4,$2);});

str = str.replace(/<[^>]*?>/ig, '');
str = str.replace(/&/ig, '&');
str = str.replace(/</ig, '<');
str = str.replace(/>/ig, '>');

return str;
}