<script type="text/javascript">
var arr=["a","b","c","d","e","f","g","h","i","j"];
// 数组的长度 lengthvar arrLength=arr.length;  // arrLength=10//删除数组元素 shift pop  ==>  splice(替换删除)// shift 删除数组的第一个元素，返回删除的值var arrShift=arr.shift();   // arr=["b","c","d","e","f","g","h","i","j"]// arrShift="a"// pop 删除数组的最后一个元素，返回删除的值var arrPop=arr.pop();  // arr=["b","c","d","e","f","g","h","i"]// arrPop="j"// splice 删除或替换数组中的值,返回删除的值  splice(开始值下标,个数,替换的值,替换的值.....)var arrSplice=arr.splice(2,2)   // arr=["b","c","f","g","h","i"]// arrSplice=["d","e"]var arrSpliceTwo=arr.splice(0,3,"a","b","c")   // arr=["a","b","c","g","h","i"]// arrSpliceTwo=["b","c","f"]// 添加数组元素 unshift push // 在数组前添加元素,返回数组长度var arrUnshift=arr.unshift("1");   // arr=["1","a","b","c","g","h","i"]// arrUnshift=7// 在数组后添加元素,返回数组长度var arrPush=arr.push("j");   // arr=["1","a","b","c","g","h","i","j"]// arrPush=8// 给数组内部元素排序 reverse sort// 将数组反续 reversevar arrReverse=arr.reverse();   // arr=["j","i","h","g","c","b","a","1"]// arrReverse=["j","i","h","g","c","b","a","1"]// 按指定的参数排序 sort 可以传递函数进行计算var arrSort=arr.sort();   // arr=["1","a","b","c","g","h","i","j"]// arrSort=["1","a","b","c","g","h","i","j"]//连接两个或更多的数组，并返回结果 concatvar arrOne=[2,3,4];var arrTwo=[6,7,8];var arrS=["a","b","c"];var arrArr=arrOne.concat(arrTwo);   //arrArr=[2, 3, 4, 6, 7, 8]var arrArrT=arrOne.concat(arrTwo,arrS);   //arrArrT=[2, 3, 4, 6, 7, 8, "a", "b", "c"]var arrArrS=arrOne.concat("5","6","7");   //arrArrS=[2, 3, 4, "5", "6", "7"]//当concat()的传值为空时，则返回一个和原数组相同的独立的新数组，此时新数组和原数组没有任何关联引用关系//我们可以用来数组复制var arrClone=arrS.concat();//此时arrClone为一个新数组无论arrS元素如何变动arrClone都不会变// 数组截取 slice slice(start,end) 不包括end值var arrSlice=arr.slice(2,5);   // arr=["1","a","b","c","g","h","i","j"]// arrSlice= ["b", "c", "g"]//当slice()的传值为空时，则返回一个和原数组相同的独立的新数组，此时新数组和原数组没有任何关联引用关系

var arrClone1=arr.slice();//此时arrClone1为一个新数组无论arr元素如何变动arrClone1都不会变
// 数组变为字符串 join toString toLocaleString // 将数组元素组成一个字符串  以（）中的值为分割符，默认为","     arr=["1","a","b","c","g","h","i","j"];   var arrJoin=arr.join(""); // arrJoin= 1abcghij    var arrJoinTwo=arr.join(); // arrJoinTwo=1,a,b,c,g,h,i,j     var arrJoinS=arr.join("-"); // arrJoinS=1-a-b-c-g-h-i-j//将数组转化成字符串    var arrString=arr.toString(); // arrString= 1,a,b,c,g,h,i,j//将数组转换为本地数组   var arrLocaleString=arr.toLocaleString(); // arrString= 1,a,b,c,g,h,i,j
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