//字符串 var txt = "Hello";
txt.length=5
txt.indexOf() txt.replace() txt.search() //對象
person=new Object(); person.firstname="Bill"; person.lastname="Gates"; person.age=56; person.eyecolor="blue";
//字符串 var txt = "Hello";
txt.length=5
txt.indexOf() txt.replace() txt.search() //對象
person=new Object(); person.firstname="Bill"; person.lastname="Gates"; person.age=56; person.eyecolor="blue";