【remove】
<!DOCTYPE html>
<html>
<body>
<div id="container">
<div>blablabla....</div>
<div>blablabla....</div>
</div>
<script type='text/javascript'>
var elm=document.getElementById('container');
var chl=elm.firstChild;
while(chl)
{
if(chl.nodeType==1)
{
console.log(elm.removeChild(chl));
break;
}
chl=chl.nextSibling;
}
</script>
</body>
</html>
