/* * js中的map */ function myJsMap() { var myMap = {}; myMap["key1"] = "value1"; myMap["key2"] = "value2"; myMap["key3"] = "value3"; if ("key2" in myMap) { alert("key2 = " + myMap["key2"]); } delete myMap["key2"]; for (var key in myMap) { alert(key + " = " + myMap[key]); } }