make printing buttons invisible

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Try this:

<head>
<meta http-equiv="content-type" content="text/html;charset=utf-8" />
<title>some title</title>
<base href="url" />
<link href="css/styles.css" rel="stylesheet" type="text/css" />
<style>
@media print {
    .print {
    visibility: hidden;
    }
}
</style>
</head>
onclick="window.print(); window.close();"
<div align="center" style="visibility: show; padding:10px" class="print">