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：

复制代码 代码如下:

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;

}