for(var key in exMap){
Console.write("key:"+key+";value:"+exMap[key]);//經我考證，the key is undefined.So the method is not right.
}

$.each(exMap,function(key,value){
Console.wiite("key:"+key+";value:"+value);
});

for(var i =0;i<list.length;i++){
value = list[i]
}