function html_trans(str) {
	str = str.replace(/\r/g,"");
	str = str.replace(/on(load|click|dbclick|mouseover|mousedown|mouseup)="[^"]+"/ig,"");
	str = str.replace(/<script[^>]*?>([\w\W]*?)<\/script>/ig,"");
	
	str = str.replace(/<a[^>]+href="([^"]+)"[^>]*>(.*?)<\/a>/ig,"\n[url=$1]$2[/url]\n");
	
	str = str.replace(/<font[^>]+color=([^ >]+)[^>]*>(.*?)<\/font>/ig,"\n[color=$1]$2[/color]\n");
	
	str = str.replace(/<img[^>]+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(/&nbsp;/g," ");
	str = str.replace(/&amp;/g,"&");
	str = str.replace(/&quot;/g,"\"");
	str = str.replace(/&lt;/g,"<");
	str = str.replace(/&gt;/g,">");
	
	str = str.replace(/<br>/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;
}

function trans(){
	var str = "";
	rtf.focus();
	rtf.document.body.innerHTML = "";
	rtf.document.execCommand("paste");
	str = rtf.document.body.innerHTML;
	if(str.length == 0) {
		alert("剪切板不存在超文本数据！");
		return "";
	}
	return html_trans(str);
}