var MixArray = function(str,str2){
        var s1=str;
        var s2=str2;
        MixAllUp(s1,s2);
        function mixNum(obj1,obj2){
            var ar = [];
            var between;
            between=obj1;
            obj1=obj2;
            obj2=between;
            ar[0]=obj1;
            ar[1]=obj2;
            return ar;
        }
        function MixAllUp(s1,s2){
            var ln = s1.length;
            var ResultArray = [];
            for (var i=0;i<ln;i++)
            {
                var someNum1 = Math.round(Math.random()*ln);
                var someNum2 = someNum1;
                while (someNum2 === someNum1)
                {
                    someNum2 = Math.round(Math.random()*ln);
                }
                //console.log(someNum1+","+someNum2);
                //debugger;
                var obj1 = this.mixNum(s1[someNum1],s1[someNum2]); ---> This is where the debugger report errors. (this.mixNum is not a function)
                var obj2 = this.mixNum(s2[someNum1],s2[someNum2]);
                this.s1[someNum1]=obj1[0];
                this.s1[someNum2]=obj1[1];
                this.s2[someNum1]=obj2[0];
                this.s2[someNum2]=obj2[1];
            }
        }

    }

    var mxA = new MixArray(word,meaning);
    word = mxA.s1;
    meaning=mxA.s2;