我打算用 window.alert = function(str){
return ;
但是我不直达奥怎么用进去

<script type="text/javascript"> localStorage.setItem("name", "张三"); localStorage.setItem("age", "28"); verify( ); //验证本地存储 localStorage.removeItem("name"); verify( ); //验证name是否存在 localStorage.clear( ); verify( ); //验证name和age是否存在 //自定义验证函数，验证name和age的数据是否存在 function verify( ){ console.log(localStorage.length); console.log(localStorage.key(0)); var type = localStorage.getItem("name"); var price = localStorage.getItem("age"); type = type ? type : '不存在'; price = price ? price : '不存在'; alert( "name: " + type + "\n\n" + "age: " + price ); } </script>