JS函数格式

onClick调用JS

<input type="button" onclick="test();"/>
<script type="text/javascript">
function a(){
	return "hello";
}
function test(){
	document.getElementById("show").innerHTML=a();
}
</script>

JS改变Html内容

<script type="text/javascript">
//---------------------
addDiv();
//---------------------
function addDiv(){
	var dialog = document.createElement('div');
	dialog.className = 'ds-thread';
	dialog.setAttribute('data-thread-key',window.location.pathname); 
	dialog.setAttribute('data-title',window.location.pathname); 
	dialog.setAttribute('data-url',window.location.href);
	document.getElementsByClassName('row')[1].appendChild(dialog);
}
</script>