摘要：var person = new Object(); person.name = "bob"; person.age = 34; person.job = "Software"; person.sayName = function(){ alert(this.... 阅读全文

摘要：// 3个特殊的引用类型：Boolean,Number,String var s1 = "some text"; var s2 = s1.substr(2,4); // me t var s3 = s1.substring(2,4); // me var s4 = s1.substring(2,-1); // so ... 阅读全文

摘要：var num = Math.random()*10; var num1 = Math.floor(num); // 向下取整 var num2 = Math.ceil(num); // 向上取整 document.write(num2+'-'); document.write(num1); // ... 阅读全文