请问为什么在网页上运行还有css这几个字符
<div id="test"><h3>HTML</h3><h3>CSS</h3><h3>JAVAScript</h3></div>
<script>
var otest=document.getElementById('test');
for(var i=0;i<otest.childNodes.length;i++){
var x=otest.childNodes[i];
otest.removeChild(x);
}
</script>
