<div id="d1"></div>

<script>

//HTML

function a(){

document.getElementById("d1").innerHTML="<img src='http://baike.baidu.com/cms/rc/240x112dierzhou.jpg'>";

}

a();

//方法

function b(){

var d1=document.getElementById("d1");

var img=document.createElement("img");

img.src="http://baike.baidu.com/cms/rc/240x112dierzhou.jpg";

d1.appendChild(img);

}

b();

//对象

function c(){

var cc=new Image();

cc.src="http://baike.baidu.com/cms/rc/240x112dierzhou.jpg";

document.getElementById("d1").appendChild(cc);

}

c();

</script>