监听实现：
/**
* Listener.js
* 此类用于解决非ie下，通过js改变input的值时，
* 无法触发其事件的问题（如：onpropertychange, oninput, onchange）
*/
function Listener() {
//定时器
var interval_l = null;
//key:name,value:value. 用于判断元素value是否变更
var objValMap = new Map();
//定时扫描的元素集
var targetObjects = null;
//检查当前浏览器是否是ie
var isIe = function () {
return jQuery.browser.msie;
}; //检查当前监听器中是否有绑定监听对象
var isEmpty = function () {
if (targetObjects == null || targetObjects.length == 0) {
return true;
}
return false;
}; //定时执行的内容
var execute = function (exeattr) {
if (isIe() && !isEmpty()) {
return;
}
if(isEmpty()){return;}
//迭代元素集合
jQuery.each(targetObjects, function (i, n) {
var oldVal = objValMap.get(n.name);
var _element = jQuery("input[name=" + n.name + "]")[0];
var newVal = _element.value;
if (oldVal != newVal) {
objValMap.put(n.name, n.value);
var _callbak = jQuery(_element).attr(exeattr);
try {
eval(_callbak);
} catch(e) {}
}
});
};
//开始执行
var start = function (seed, exeattr) {
if (isIe() && !isEmpty()) {
return;
}
if (seed == undefined || seed == 0) {
seed = 500;
}
if (exeattr == undefined) {
exeattr = "_listener";
}
interval_l = window.setInterval(function () {execute(exeattr);}, seed);
}
//停止监听器
var stop = function () {
if (interval_l) {
window.clearInterval(interval_l);
}
};
//绑定监听对象
var load = function (selector) { if (isIe()) {
return;
}
if (selector == undefined) {
selector = "input[type=hidden][_listener!='']";
}
targetObjects = jQuery(selector);
jQuery.each(targetObjects, function (i, n) {
objValMap.put(n.name, n.value);
});
};
this.execute = execute;
this.start = start;
this.stop = stop;
this.load = load;
} /**
* 键值对，同Java Map
*/
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;
};
调用实例：
jQuery(document).ready(function(){
var ua=navigator.userAgent.toLowerCase();
var s=null;
var browser={
msie:(s=ua.match(/msie\s*([\d\.]+)/))?s[1]:false,
firefox:(s=ua.match(/firefox\/([\d\.]+)/))?s[1]:false,
chrome:(s=ua.match(/chrome\/([\d\.]+)/))?s[1]:false,
opera:(s=ua.match(/opera.([\d\.]+)/))?s[1]:false,
safari:(s=ua.match(/varsion\/([\d\.]+).*safari/))?s[1]:false
};
if(browser.msie){
jQuery("#field8304").bind("propertychange", getUp);
}else{
jQuery("#field8304").attr("_listener","getUp();");
}
var l = new Listener();
l.load("input[type=hidden][_listener!='']"); //不传参数时，默认参数为："input[type=hidden][_listener!='']";
l.start(500, "_listener"); //不传参数时，默认参数为：500, "_listener"
});
function getUp(){
alert("change");
}