我尝试了以下方法：
<button onclick="window.print()" class="uk-button uk-float-left"><?php echo JText::_('COM_CSTUDOMUS_IMPRIMIR'); ?></button>
还：
self.print()
window.focus();window.print()
当我单击打印时，它会显示主窗口和要打印的页面中的弹出窗口。我只需要弹出窗口的内容。
这是打印弹出窗口的示例：
<div class="contentSection">
<div class="contentToPrint">
<!-- content to be printed here -->
</div>
</div>
<div class="contentSection">
<a href="#" id="printOut">Print This</a>
</div>
<div class="contentSection termsToPrint">
<h4>Terms & conditions</h4>
<p>Management reserves the right to withdraw, amend or suspend this print job in the event of any unforeseen circumstances outside its reasonable control, with no liability to any third party.</p>
</div>
<script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.5.0/jquery.min.js"></script>
<script type="text/javascript">
$(function(){
$('#printOut').click(function(e){
e.preventDefault();
var w = window.open();
var printOne = $('.contentToPrint').html();
var printTwo = $('.termsToPrint').html();
w.document.write('<html><head><title>Copy Printed</title></head><body><h1>Copy Printed</h1><hr />' + printOne + '<hr />' + printTwo) + '</body></html>';
w.window.print();
w.document.close();
return false;
});
});
</script>