是否有事实上的标准来标识要附加到的JavaScript库的HTML元素？

fooLibButton

fooLibList

/*
 * addLoadEvent based upon this blog article:
 *
 * http://simon.incutio.com/archive/2004/05/26/addLoadEvent
 */
function addLoadEvent(func) {
    var oldonload = window.onload;
    if (typeof window.onload != 'function') {
        window.onload = func;
    } else {
        window.onload = function() {oldonload();func();}
    }
}

/*
 * As proposed by Bernard Marx on:
 * http://www.webmasterworld.com/forum91/1729.htm
 */
function getElementsByCondition(condition,container) {
    container = container||document
    var all = container.all||container.getElementsByTagName('*')
    var arr = []
    for(var k=0;k<all.length;k++){
        var elm = all[k]
        if(condition(elm,k)){
            arr[arr.length] = elm
        }
    }
    return arr
}
function checkWetherContainsClass(classname,element){
    var classes =
    element.className.split(" ");
    var found = false;
    var k=0;
    while(k<classes.length&&classes!=classname){k++;}
    return !(k == classes.length);
}

function getElementsByClass(classname,container){
    return getElementsByCondition(function(x,y){return checkWetherContainsClass(classname,x);},container);
}