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js window.print实现打印特定控件或内容

　　本文标签：window.print,打印

window.print可以打印网页，但有时候我们只希望打印特定控件或内容，怎么办呢？

window.print打印指定div
首先我们可以把要打印的内容放在div中，然后用下面的代码进行打印 。
复制代码 代码如下:

<html>
<head>
<script language="javascript">
function printdiv(printpage)
{
var headstr = "<html><head><title></title></head><body>";
var footstr = "</body>";
var newstr = document.all.item(printpage).innerHTML;
var oldstr = document.body.innerHTML;
document.body.innerHTML = headstr+newstr+footstr;
window.print();
document.body.innerHTML = oldstr;
return false;
}
</script>
<title>div print</title>
</head>

<body>
//HTML Page
//Other content you wouldnt like to print
<input name="b_print" type="button" class="ipt" onClick="printdiv(div_print);" value=" Print ">

<div id="div_print">

<h1 style="Color:Red">The Div content which you want to print</h1>

</div>
//Other content you wouldnt like to print
//Other content you wouldnt like to print
</body>
</html>