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