Printing ASPX HTML Forms

Here is the way to print a part of a HTML, ASPX Form
 

 This is the content in the page to print

<script language=JavaScript>
<!--
function printPartOfPage(elementId)
{
 var printContent = document.getElementById(elementId);
 var windowUrl = 'about:blank';
 var uniqueName = new Date();
 var windowName = 'Print' + uniqueName.getTime();
 var printWindow = window.open(windowUrl, windowName, 'left=50000,top=50000,width=0,height=0');
 printWindow.document.write(printContent.innerHTML);
 printWindow.document.close();
 printWindow.focus();
 printWindow.print();
 printWindow.close();
}
// -->
</script>
<div id="printDiv">
 This is the content in the page to print
</div>
//////////////////////////
// To fire the event:
//////////////////////////
<input type="button" value="Print" onclick="JavaScript:printPartOfPage('printDiv');" >