JavaScript 实现打印网页指定区域的完整代码示例

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>js print打印网页指定区域内容的简单实例</title>
</head>
<script>
function myPrint(obj){
  var newWindow=window.open("打印窗口","_blank");
  var docStr = obj.innerHTML;
  newWindow.document.write(docStr);
  newWindow.document.close();
  newWindow.print();
  newWindow.close();
}
</script>
<div id="print">
<hr />
  打印演示区域,点击打印后会在新窗口加载这里的内容！
<hr />
</div>
<button onclick="myPrint(document.getElementById('print'))">打 印</button>

</html>