JavaScript 版本自动生成文章摘要

实现内容：截断一段含有HTML代码的文本，但是不会出现围堵标记没有封闭的问题。

php版本地址
核心部分如下：

function Generate_Brief(text,length){ 
if(text.length < length) return text; 
var Foremost = text.substr(0,length); 
var re = /<(\/?) 
(BODY|SCRIPT|P|DIV|H1|H2|H3|H4|H5|H6|ADDRESS|PRE|TABLE|TR|TD|TH|INPUT|SELECT|TEXTAREA|OBJECT 
|A|UL|OL|LI|BASE|META|LINK|HR|BR|PARAM|IMG|AREA|INPUT|SPAN)[^>]*(>?)/ig; var Singlable = /BASE|META|LINK|HR|BR|PARAM|IMG|AREA|INPUT/i 
var Stack = new Array(), posStack = new Array(); 
while(true){ 
var newone = re.exec(Foremost); 
if(newone == null) break; 
if(newone[1] == ""){ 
var Elem = newone[2]; 
if(Elem.match(Singlable) && newone[3]!= ""){ 
continue; 
} 
Stack.push(newone[2].toUpperCase()); 
posStack.push(newone.index); 
if(newone[3] == "") break; 
}else{ 
var StackTop = Stack[Stack.length-1]; 
var End = newone[2].toUpperCase(); 
if(StackTop == End){ 
Stack.pop(); 
posStack.pop(); 
if(newone[3] == ""){ 
Foremost = Foremost+">"; 
} 
} 
}; 
} 
var cutpos = posStack.shift(); 
Foremost = Foremost.substring(0,cutpos); 
return Foremost; 
}