<script>?
function Map() {
?var struct = function(key, value) {
??this.key = key;
??this.value = value;
?}
?
?var put = function(key, value){
??for (var i = 0; i < this.arr.length; i++) {
???if ( this.arr[i].key === key ) {
????this.arr[i].value = value;
????return;
???}
??}
?? this.arr[this.arr.length] = new struct(key, value);
?}
?
?var get = function(key) {
??for (var i = 0; i < this.arr.length; i++) {
???if ( this.arr[i].key === key ) {
???? return this.arr[i].value;
???}
??}
??return null;
?}
?
?var remove = function(key) {
??var v;
??for (var i = 0; i < this.arr.length; i++) {
???v = this.arr.pop();
???if ( v.key === key ) {
????continue;
???}
???this.arr.unshift(v);
??}
?}
?
?var size = function() {
??return this.arr.length;
?}
?
?var isEmpty = function() {
??return this.arr.length <= 0;
?}

?this.arr = new Array();
?this.get = get;
?this.put = put;
?this.remove = remove;
?this.size = size;
?this.isEmpty = isEmpty;
}
</script>

<script>
?var map = new Map();
?map.put("re","redhacker");
?map.put("do","douguoqiang");
?map.put("gq","dougq");
?alert("map的大小为：" + map.size())
?alert("key为re的map中存储的对象为：" + map.get("re"));
?map.remove("re");
?alert("移除key为re的对象后，获取key为re的map中存储的对象为：" + map.get("re"));
?alert("map移除一个元素后的大小为：" + map.size());
?alert("map是否是一个空map:" + map.isEmpty());
</script>

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