- document.getElementsByClassName
if (!document.getElementsByClassName) {
document.getElementsByClassName = function (cls) {
var ret = [];
var els = document.getElementsByTagName('*');
for (var i = 0, len = els.length; i < len; i++) {
if (els[i].className === cls
|| els[i].className.indexOf(cls + ' ') >= 0
|| els[i].className.indexOf(' ' + cls + ' ') >= 0
|| els[i].className.indexOf(' ' + cls) >= 0) {
ret.push(els[i]);
}
}
return ret;
}
}
