function printPage() {
var newWin = window.open("printer.aspx","","");
var titleHTML = document.getElementById("printdiv").innerHTML;
newWin.document.write(" <html>");
newWin.document.write(" <body style='text-align:center'>");
newWin.document.write(" <h2>用户登录信息 </h2>");
newWin.document.write(titleHTML);
newWin.document.write(" </body>");
newWin.document.write(" </html>");
newWin.document.location.reload();
newWin.print();
newWin.close();
document.getElementById("GridView2").AllowPaging = true;
}
<div id="printdiv">
<!--startprint-->
<table></table> </div>
<input id="print" type="button" onclick="printPage()" value="print"/>
