js对联广告代码，兼容性高

var browser = { ie6: function () { return ((window.XMLHttpRequest == undefined) && (ActiveXObject != undefined)) }, getWindow: function () { var myHeight = 0; var myWidth = 0; if (typeof (window.innerWidth) == 'number') { myHeight = window.innerHeight; myWidth = window.innerWidth } else if (document.documentElement) { myHeight = document.documentElement.clientHeight; myWidth = document.documentElement.clientWidth } else if (document.body) { myHeight = document.body.clientHeight; myWidth = document.body.clientWidth } return { 'height': myHeight, 'width': myWidth} }, getScroll: function () { var myHeight = 0; var myWidth = 0; if (typeof (window.pageYOffset) == 'number') { myHeight = window.pageYOffset; myWidth = window.pageXOffset } else if (document.documentElement) { myHeight = document.documentElement.scrollTop; myWidth = document.documentElement.scrollLeft } else if (document.body) { myHeight = document.body.scrollTop; myWidth = document.body.scrollLeft } return { 'height': myHeight, 'width': myWidth} }, getDocWidth: function (D) { if (!D) var D = document; return Math.max(Math.max(D.body.scrollWidth, D.documentElement.scrollWidth), Math.max(D.body.offsetWidth, D.documentElement.offsetWidth), Math.max(D.body.clientWidth, D.documentElement.clientWidth)) }, getDocHeight: function (D) { if (!D) var D = document; return Math.max(Math.max(D.body.scrollHeight, D.documentElement.scrollHeight), Math.max(D.body.offsetHeight, D.documentElement.offsetHeight), Math.max(D.body.clientHeight, D.documentElement.clientHeight)) } }; var dom = { ID: function (id) { var type = typeof (id); if (type == 'object') return id; if (type == 'string') return document.getElementById(id); return null }, insertHtml: function (html) { var frag = document.createDocumentFragment(); var div = document.createElement("div"); div.innerHTML = html; for (var i = 0, ii = div.childNodes.length; i < ii; i++) { frag.appendChild(div.childNodes[i]) } document.body.insertBefore(frag, document.body.firstChild) } }; var myEvent = { add: function (element, type, handler) { var ele = dom.ID(element); if (!ele) return; if (ele.addEventListener) ele.addEventListener(type, handler, false); else if (ele.attachEvent) ele.attachEvent("on" + type, handler); else ele["on" + type] = handler }, remove: function (element, type, handler) { var ele = dom.ID(element); if (!ele) return; if (ele.removeEventListener) ele.removeEventListener(type, handler, false); else if (ele.detachEvent) ele.detachEvent("on" + type, handler); else ele["on" + type] = null } }; var position = { rightCenter: function (id) { var id = dom.ID(id); var ie6 = browser.ie6(); var win = browser.getWindow(); var ele = { 'height': id.clientHeight, 'width': id.clientWidth }; if (ie6) { var scrollBar = browser.getScroll() } else { var scrollBar = { 'height': 0, 'width': 0 }; id.style.position = 'fixed' } ele.top = parseInt((win.height - ele.height) / 2 + scrollBar.height); id.style.top = ele.top + 'px'; id.style.right = '3px' }, floatRightCenter: function (id) { position.rightCenter(id); var fun = function () { position.rightCenter(id) }; if (browser.ie6()) { myEvent.add(window, 'scroll', fun); myEvent.add(window, 'resize', fun) } else { myEvent.add(window, 'resize', fun) } }, leftCenter: function (id) { var id = dom.ID(id); var ie6 = browser.ie6(); var win = browser.getWindow(); var ele = { 'height': id.clientHeight, 'width': id.clientWidth }; if (ie6) { var scrollBar = browser.getScroll() } else { var scrollBar = { 'height': 0, 'width': 0 }; id.style.position = 'fixed' } ele.top = parseInt((win.height - ele.height) / 2 + scrollBar.height); id.style.top = ele.top + 'px'; id.style.left = '3px' }, floatLeftCenter: function (id) { position.leftCenter(id); var fun = function () { position.leftCenter(id) }; if (browser.ie6()) { myEvent.add(window, 'scroll', fun); myEvent.add(window, 'resize', fun) } else { myEvent.add(window, 'resize', fun) } } };

function ad_left() {
    var html;
    html = '<div id="ad_left" style="position:absolute;width:100px;height:300px;z-index:10001"><a style="position:absolute;top:-15px;left:0;" href="javascript:void(0);" onclick="document.getElementById(\'ad_left\').style.display=\'none\'">关闭</a><a href="/" target=_blank><img src="http://www.com/ad/x1.gif" width="100" height="300" /></a></div>';
    dom.insertHtml(html); position.floatLeftCenter('ad_left');
}
function ad_right() {
    var html;
    html = '<div id="ad_right" style="position:absolute;width:100px;height:300px;z-index:10001"><a style="position:absolute;top:-15px;right:0;" href="javascript:void(0);" onclick="document.getElementById(\'ad_right\').style.display=\'none\'">关闭</a><a href="/" target=_blank><img src="http://www.com/ad/x1.gif" width="100" height="300" /></a></div>';
    dom.insertHtml(html); position.floatRightCenter('ad_right');
}
myEvent.add(window, 'load', ad_left);
myEvent.add(window, 'load', ad_right);