innerHTML、outerHTML、innerText、outerText的区别

<div id="div"><input name="button" value="Button" type="button"><font color="green"><h2>This is a DIV!</h2></font></div> 
<input name="innerHTML" value="innerHTML" type="button"
OnClick="alert(div.innerHTML);"> 
<input name="outerHTML" value="outerHTML" type="button" 
OnClick="alert(div.outerHTML);"> 
<input name="innerText" value="innerText" type="button" OnClick="alert(div.innerText);"> 
<input name="outerText" value="outerText" type="button" OnClick="alert(div.outerText);"> 

运行一下上面的代码就知道区别的所在了^_^