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');
var PrintHeader = '';
var PrintFooter = '';
printWindow.document.write(PrintHeader);
printWindow.document.write(printContent.innerHTML);
printWindow.document.write(PrintFooter);
printWindow.document.close();
printWindow.focus();
printWindow.print();
printWindow.close();
}