function myAddEvent(obj, sEv, fn) {    if (obj.attachEvent) {        obj.attachEvent('on' + sEv, fn)    } else {        obj.addEventListener(sEv, fn, false);    }}function getByClass(oParent, sClass) {    var aEle = oParent.getElementByTagName('*');    var aResult = [];    var i = 0;        for (var i = 0; i