<script language="javascript" type="text/javascript">
//创建变量testArray 并引用数组 ["1","2","3"]
var testArray = ["1","2","3"];
//引用数组 ，此时 变量 linkOne linkTwo testArray 均引用数组 ["1","2","3"]
var linkOne =linkTwo =testArray;
//修改testArray 引用数组 ["4","5","6"]，此时 linkOne linkTwo 仍引用数组 ["1","2","3"]
testArray = ["4","5","6"]
//这里将返回 2
alert(linkTwo[1]);


//创建变量testObj 并引用对象 {one:"1",tow:"2",three:"3"}
var testObj = {one:"1",tow:"2",three:"3"}
//引用对象， 此时objLinkOne 引用 对象 {one:"1",tow:"2",three:"3"}
var objLinkOne = testObj
//修改对象
testObj.tow="133"
//testObj引用新对象{one:"4",tow:"5",three:"6"} objLinkOne仍引用原对象
testObj = {one:"4",tow:"5",three:"6"}
//这里将返回 133
alert(objLinkOne.tow);

//strTest 引用字符串 im
var strTest = "im";
//strTestNew 引用字符串 im
var strTestNew = strTest;
//strTestNew 引用新的字符串 im new str
strTestNew += " new str";
//这里将返回 im
alert(strTest);

</script>