帮忙看看这个对象字面量写法哪里出错了?

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
  <title> New Document </title>
  <meta name="Generator" content="EditPlus">
  <meta name="Author" content="">
  <meta name="Keywords" content="">
  <meta name="Description" content="">
  <script type="text/javascript">

</script>
</head>
<body>
<script type="text/javascript">
function blue(agrs){
var out = "";
if(typeof agrs.name == "String"){
out += "Name:" + agrs.name + "\n";
}
if(typeof agrs.age == "Number"){
out += "Age:" + agrs.age + "\n";
}
alert(out);
}
blue({
name:"blue";
age:22;
})
</script>

</body>
</html>

解决方案 »

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                function blue(agrs){
                    var out = "";
                    if(typeof agrs.name == "string"){
                            out += "Name:" + agrs.name + "\n";
                    }
                    if(typeof agrs.age == "number"){
                            out += "Age:" + agrs.age + "\n";
                    }
                    alert(out);
                }
                blue({
                        name:"blue",
                        age:22
                })
function blue(agrs){
    var out = "";    if(agrs.name.constructor == String){
            out += "Name:" + agrs.name + "\n";
    }
    if(agrs.age.constructor == Number){
            out += "Age:" + agrs.age + "\n";
    }
    alert(out);
}
blue({
        name:"blue",
        age:22
})
仔细对照下typeof使用的时候要小心不是不行。而是注意大小写