function html_trans(str) {
str = str.replace(/\r/g,"");
str = str.replace(/on(load|click|dbclick|mouseover|mousedown|mouseup)="[^"]+"/ig,"");
str = str.replace(/]*?>([\w\w]*?)<\/script>/ig,"");

str = str.replace(/]+href="([^"]+)"[^>]*>(.*?)<\/a>/ig,"\n$2\n");

str = str.replace(/]+color=([^ >]+)[^>]*>(.*?)<\/font>/ig,"\n$2\n");

str = str.replace(/]+src="([^"]+)"[^>]*>/ig,"\n\n");

str = str.replace(/<([\/]?)b>/ig,"[$1b]");
str = str.replace(/<([\/]?)strong>/ig,"[$1b]");
str = str.replace(/<([\/]?)u>/ig,"[$1u]");
str = str.replace(/<([\/]?)i>/ig,"[$1i]");

str = str.replace(/ /g," ");
str = str.replace(/&/g,"&");
str = str.replace(/"/g,"\"");
str = str.replace(/</g,"<");
str = str.replace(/>/g,">");

str = str.replace(/
/ig,"\n");
str = str.replace(/<[^>]*?>/g,"");
str = str.replace(/\[url=([^\]]+)\]\n(\[img\]\1\[\/img\])\n\[\/url\]/g,"$2");
str = str.replace(/\n+/g,"\n");

return str;
}