为什么我这样写页面崩溃了
function get_previousSibling(i){
var a = i.previousSibling;
while(a && a.nodeType != 1){
a= i.previousSibling;
}
return a;
}
var b = document.getElementsByTagName('li')[1];
document.write(b.nodeName);
document.write(' = ');
document.write(b.innerHTML+'<br>');
var c = get_previousSibling(b);
if(c!=null){
document.write(c.nodeName);
document.write(' = ');
document.write(c.innerHTML);
}else{
document.write('这个是空节点');
}我这样写页面崩溃了，我感觉没有啥问题.....看不出来问题，然后我把
while(a && a.nodeType != 1)
改成
while(i && i.nodeType != 1)
就不会崩溃 还可以运行
