封装getByClass

function getByClass(oParent, sClass) {
var aResult = [];
var aEle = oParent.getElementsByTagName('*');
for (var i = 0; i < aEle.length; i++) {
// 当className相等时添加到数组中
// aEle[i].className.search(sClass)!=-1
// aEle[i].className.indexof(sClass)!=-1
if (aEle[i].className == sClass) {
aResult.push(aEle[i]);
}
}
return aResult;
};

function getByClass(oParent,sClass) {
var aResult = [];
var aEle = oParent.getElementsByTagName('*');
var re = new RegExp('\\b' + sClass + '\\b', 'i')
for (var i = 0; i < aEle.length; i++) {
if (re.test(aEle[i].className)) {
aResult.push(aEle[i]);
}
}
return aResult;
};

function getByClass(oParent,sClass) {
var aResult = [];
var aEle = oParent.getElementsByTagName('*');
for (var i = 0; i < aEle.length; i++) {
var arr = aEle[i].className.split(/\s+/);
for (var j = 0; j < arr.length; j++) {
if (arr[j] == sClass) {
aResult.push(aEle[i])
}
}
}
return aResult;
};