javascript:Globalグローバルオブジェクト、符号化復号、eval方法

    type</span>=text/javascript charset=utf-<span class="hljs-number">8</span>>

            <span class="hljs-comment">//Global     ，       </span>

            <span class="hljs-javadoc">/**
             *      
             *     ：encodeURI,encodeURIComponent，     ，             
             *     ：decodeURI,decodeURIComponent
             *   ，           ：
             *  encodeURIComponent        decodeURI  ，       
             *  encodeURI       decodeURIComponent  
             *       escape，unescape      
             */</span>

            <span class="hljs-keyword">var</span> url = <span class="hljs-string">'http://www.baidu.com cn'</span>;

            <span class="hljs-comment">//  </span>
            <span class="hljs-keyword">var</span> str1 = encodeURI(url);           <span class="hljs-comment">//    ：http://www.baidu.com%20cn </span>
            <span class="hljs-keyword">var</span> str2 = encodeURIComponent(url);  <span class="hljs-comment">//    ：http%3A%2F%2Fwww.baidu.com%20cn </span>
            document.write(str2);

            <span class="hljs-comment">//  </span>
            <span class="hljs-keyword">var</span> str3 = decodeURI(str1);
            <span class="hljs-keyword">var</span> str4 = decodeURIComponent(str2);

            <span class="hljs-javadoc">/**
             * eval(string)  ，   javascript   
             */</span>

            <span class="hljs-comment">//  js  </span>
            <span class="hljs-keyword">var</span> str5 = <span class="hljs-string">"var a=30,b=20"</span>;
            eval(str5);
            alert(a+b);

            <span class="hljs-comment">//    </span>
            <span class="hljs-keyword">var</span> strObj = <span class="hljs-string">"{name:'Lingbo' , age:20}"</span>;
            <span class="hljs-keyword">var</span> obj = eval(<span class="hljs-string">'('</span>+ strObj +<span class="hljs-string">')'</span>);
            alert(obj.name);