window.print打印指定div

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？

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。

<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 wouldn't 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 wouldn't like to print
//Other content you wouldn't like to print
</body>

</html>

转自 http://blog.csdn.net/bintime/article/details/4296401

打印时会闪一下，因为把oldstr替换成newstr了，页面会变成新的页面