for(var i=0;i<5;i++){
console.log("正常输出");
}
console.log(i);
//  2 正常输出
//  5

with(location){
var qs = search.substring(1);
var hostName=hostname;
var url=href;
console.log(qs);

console.log(hostName);

console.log(url);
}