js获取子节点函数(兼容FF与IE)

functiongetFirstChild(obj){
varresult=obj.firstChild;
while(!result.tagName){
result=result.nextSibling;
}
returnresult;
}

functiongetNextChild(obj){
varresult=obj.nextSibling;
while(!result.tagName){
result=result.nextSibling;
}
returnresult;
}