IE7無法使用getElementByName 替代方案

function getElementsByModifiedId(baseIdentifier) {//計算file數量
var allWantedElements = [];
var idMod = 0;
while(document.getElementById(baseIdentifier + idMod)) { // will stop when it can't find any more
allWantedElements.push(document.getElementById(baseIdentifier + idMod++));
}
return allWantedElements;
}