<script type="text/javascript">            //数组            var beatles=Array(4);            var beatles=Array();                console.log(beatles);//[]            beatles[0]="John";            beatles[1]="Paul";            beatles[2]="George";            beatles[3]="Ringo";                console.log(beatles[3]);//Ringo            var beatles=Array("John","Paul","George","Ringo");                console.log(beatles.length);//4            var beatles=["John","Paul","George","Ringo","Liuwei"];                console.log(beatles[4]);//Liuwei            var lennon=["John",1940,1943];                console.log(lennon.length);//3            var name="John";            beatles[0]=name;                console.log(beatles[0]);//John            var names=["Ringo","John","George","Paul"];            beatles[1]=names[2];                console.log(beatles[1]);//George            var lennon=["Ringo",1940,false];            var beatles=[];            beatles[0]=lennon;                console.log(beatles[0]);//["Ringo",1940,false]            var lennon=Array();            lennon["name"]="John";//不建议用这种关联数组            lennon["year"]=1943;            lennon["living"]=false;            console.log(lennon);//[]                                //living  false                                //name    "John"                                //year    1943        </script>