方法一:var myarray = new Array(66,80,90,77,59);方法二:var myarray = [66,80,90,77,59];方法三:var myarray=new Array(5); myarray[0]=66; myarray[1]=80; myarray[2]=90; myarray[3]=77; myarray[4]=59; 数组的属性:myarray.length; //获得数组长度