if (!document.getElementsByClassName) {
document.getElementsByClassName = function(classname) {
var elArray = [];
var tmp = document.getElementsByTagName("*");
var regex = new RegExp("(^|\\s)" + classname + "(\\s|$)");
for (var i = 0; i < tmp.length; i++) {
if (regex.test(tmp[i].className)) {
elArray.push(tmp[i]);
}
}
return elArray;
};
}