APEX

I've been opening a modal window, and using a print button on the floating window to access the code shown below, to print pages weekly, since mid-April. I just went to print this week's pages, and I'm getting unexpected results:
a header in the very top margin, with the date and time on the left, and the page title centered
a footer at the very bottom, with the URL of the page
What can I add to the code shown below to hide the header and footer that have suddely popped in?
Thank you -
mt in NY (yes, I tried to change my profile)

//// Collapse Left Navigation Bar If It Was Expanded ////
var navCollapsed = 0;
if ($("body").hasClass("js-navExpanded")) {
$("#t_Button_navControl").click();
navCollapsed = 1;
};
setTimeout(3000);

//////// Hide ////////

//Hide Navigation Bar List
$("#t_Header").hide();

//Hide Navigation Menu
$("#t_Body_nav").hide();

//Hide Breadcrumb
$("#t_Body_title").hide();

//Hide Content Offset
$("#t_Body_content_offset").hide();

//Hide Report Column Edit Link
$(".apex-edit-page").hide();

//Hide Report Download Links
$(".t-Report-links").hide();

//Hide Buttons
$(".t-Button").hide();

//Hide Footer
$(".t-Footer").hide();

//////// Browser Print ////////
window.print();

//////// Show ////////

//Show Navigation Bar List
$("#t_Header").show();

//Show Navigation Menu
$("#t_Body_nav").show();

//Show Breadcrumb
$("#t_Body_title").show();

//Show Content Offset
$("#t_Body_content_offset").show();

//Show Report Column Edit Link
$(".apex-edit-page").show();

//Show Report Download Links
$(".t-Report-links").show();

//Show Buttons
$(".t-Button").show();

//Show Footer
$(".t-Footer").show();

//// Expand Left Navigation Bar If It Was Colapsed ////
if ( navCollapsed == 1 ) {
$("#t_Button_navControl").click();
}