js打印iframe中div内容的方法

function doPrint(){
        var turl = document.getElementById("iframeid").src;
        var newW = window.open(turl);
        newW.print();
}

<div id='contect'>
教程集，欢迎大家的光临 。
</div>
<script type="text/javascript">
/*<![CDATA[*/
print_ele_f('contect');
function print_ele_f(id_s)
{
  var ele = document.getElementById(id_s);
     
  var w = window.open('about:blank');
  setTimeout(function(){
  w.document.body.innerHTML = ele.innerHTML;
  w.print();},100)
}
/*]]>*/
</script>