Java 打印一个 DIV

<div id="image"></div>
<input type="submit" value="打印" onclick="print1()">

<script language="javascript">
function print1(){
var printBody = document.getElementById("image");
var printBodyHTML="";
var bodyHTML="";
if(printBodyHTML==""){
printBodyHTML = printBody.innerHTML;
}
if(bodyHTML==""){
bodyHTML = document.body.innerHTML;
}
document.body.innerHTML = printBodyHTML;
window.print();
document.body.innerHTML = bodyHTML;
}
</script>