取自jQuery docs：
var arr = [ "one", "two", "three", "four", "five" ];var obj = { one:1, two:2, three:3, four:4, five:5 };jQuery.each(arr, function() { $("#" + this).text("My id is " + this + "."); return (this != "four"); // will stop running to skip "five"});jQuery.each(obj, function(i, val) { $("#" + i).append(document.createTextNode(" - " + val));});
