SOURCE

function writeDocument(variable){
    document.write(variable+"<br/>");


}
var arr=["dsdadada","dddd","ssss"];
writeDocument(arr);
writeDocument("数组长度"+arr.length);
writeDocument("获取数组的1-2号元素"+arr.slice(1,3));
writeDocument("往数组头添加元素");
writeDocument(arr.unshift("dd","yy"));
writeDocument(arr);
writeDocument("往数组尾部添加元素-");
writeDocument(arr.push("bb","sss"));
writeDocument("删除数组的第一个元素");
writeDocument("删除元素"+arr.shift());
writeDocument(arr);
writeDocument("删除数组的最后一个元素"); 
writeDocument("删除元素"+arr.pop());
writeDocument(arr);