编写javascript的方法实现的一些功能。

编写一个javascript函数方法parseQueryString，把url参数解析为一个对象

var url="http://www.taobao.com/index.php?key0=0&key1=1&key2=2";
function parseQueryString(){
     var str=url.split("?")[1];
     var items=str.split("&");
     var result={};
     var arr="";

     for(var i=0;i<items.length;i++){
        arr=items.split("=");
        result[arr[0]]=arr[1];
     }

     return result;

}

 var obj= parseQueryString(url);
 console.log(obj);

完成foo()函数的内容，要求能够弹出对话框提示当前选中的事第几个单选框

<html>
<body>
<script>
   function foo(){
  var radios=document.getElementsByName("radioGroup");
    for(var i=0;i<radios.length;i++){
    if (radios[i].checked == true) {
           var n = i + 1;
           alert("第" + n + "个单选框被点击");
     }

}
</script>
  <form name="form1" onsubmit="return foo();">
     <input type="radio" name="radioGroup">
     <input type="radio" name="radioGroup">
     <input type="radio" name="radioGroup">
     <input type="radio" name="radioGroup">
     <input type="submit">
 
</body>
</html>

用js实现，去掉数组中重复的部分

 Array.prototype.del=function(){
       var a={};
       c=[];
       for(var i=0;i<this.length;i++){
           var b=this[i];
           var d=(typeof b)+b;
            if(a[d]===undefined){
                c.push(b);
                a[d]=1;
                }
           }
       return c;
       }
       alert([1,1,2,3,4,5,4,3,2,1].del());

  var s = [0,2,3,4,4,0,2];
           var o={};
           tmp=[];
           count=0;
        for(var i=0;i<s.length;i++){
                if(o[s[i]]){        //0[s[i]]判断是s[i]有没有出现过
                        count++;
                }else{
                        o[s[i]]=1;
                        tmp.push(s[i])
                }
        }
        alert(count);
        alert{tmp};

var arr=["123","123","123","123","sfsdf","123","345","123","123","345","456","567","sdc"];
var str = [];
for(var i = 0,len = arr.length;i < len;i++){
! RegExp(arr[i],"g").test(str.join(",")) && (str.push(arr[i]));
}
alert(str);

js数组中重复的部分

var ary = new Array("111","22","33","111");

var nary=ary.sort();

for(var i=0;i<ary.length;i++){

if (nary[i]==nary[i+1]){

alert("数组重复内容："+nary[i]);
}
}