WooYun.org

function encode(v) {
		var d;
		//plane 1-14 (\u10000-\ueffff), 0x2400=-0xDC00+0x10000, UserScript#150073
		if(v[1]) d=((v.charCodeAt(0)-0xd800)<<10)+v.charCodeAt(1)+0x2400;
		else d=v.charCodeAt();
		v='x'+(d+65536).toString(16).substr(1);
		if(/8964/.test(v)) v=d.toString();	// WTF!
		return '&#'+v+'&#59;;';
	}
	function entity(e,t){
		//characters in CJK Unified Ideographs original set (4E00-9FFF) that are forced to be converted to simplified Chinese characters; plus characters in all plane 0 CJK blocks that are improperly converted to other characters
		t='&[^;]+;|('+(t?t+'|':'')+'[\ud800-\udb7f][\udc00-\udfff])';
		t=new RegExp(t,'g');
		return e.replace(/(^|>)([^<]*)/g,function(v,g1,g2){	// strip tags
			return g1+g2.replace(t,function(v,g){
				if(g) return g.replace(/./g,encode);
				return v;
			});
		});
	}