//找出两段文本中相同的单词短句
    <SCRIPT LANGUAGE="javascript">
    function meizz(a, b, n)
    {
        var c=a.length>b.length?b:a;
        if(b==c) b=a; a=c; //少做些循环
        if(!n) n=1;
        var mm = new Array();
        for(var i=0; i<a.length; i++)
        {
            for(var j=i+n; j<=a.length; j++)
            {
                var s = a.substring(i, j);
                if(b.indexOf(s)==-1)
                {
                    if(s.length>n)
                    {
                        mm[mm.length] = a.substring(i, j-1);
                        i = j-2;
                    }
                    break;
                }
                else
                {
                    if(j==a.length)
                    {
                        mm[mm.length]=s;
                    }
                }
            }
           
        }
        return mm.Unique().join(","); //去除数组里的重复项
        //return mm.join(",");
    } [转自：711网络工作室 http://www.tc711.com]

    Array.prototype.Unique = function()
    {
      var a = {}; for(var i=0; i<this.length; i++)
      {
        if(typeof a[this[i]] == "undefined")
          a[this[i]] = 1;
      }
      this.length = 0;
      for(var i in a)
        this[this.length] = i;
      return this;
    }; [转自：711网络工作室 http://www.tc711.com]

    
    var a = "我们是最好的";
    var b = "我们不是最差的";
    //结果得出"我们"&"是最"
    alert("返回的结果："+ meizz(a, b, 2));
    </SCRIPT>