详解JavaScript编程中的数组结构

var mycars = new Array();
mycars[0] = "Saab";
mycars[1] = "Volvo";
mycars[2] = "BMW";

var car1="Saab";
var car2="Volvo";
var car3="BMW";

var myCars=new Array(); 
myCars[0]="Saab";    
myCars[1]="Volvo";
myCars[2]="BMW";

var myCars=new Array("Saab","Volvo","BMW");

var myCars=["Saab","Volvo","BMW"];

var name=myCars[0];

myCars[0]="Opel";

myArray[0]=Date.now;
myArray[1]=myFunction;
myArray[2]=myCars;

var x=myCars.length       // the number of elements in myCars
var y=myCars.indexOf("Volvo")  // the index position of "Volvo"

Array.prototype.ucase=function()
{
 for (i=0;i<this.length;i++)
 {this[i]=this[i].toUpperCase();}
}