MediaWiki:Common.js

Note: After saving, you may have to bypass your browser's cache to see the changes.

• Firefox / Safari: Hold Shift while clicking Reload, or press either Ctrl-F5 or Ctrl-R (⌘-R on a Mac)
• Google Chrome: Press Ctrl-Shift-R (⌘-Shift-R on a Mac)
• Internet Explorer / Edge: Hold Ctrl while clicking Refresh, or press Ctrl-F5
• Opera: Go to Menu → Settings (Opera → Preferences on a Mac) and then to Privacy & security → Clear browsing data → Cached images and files.

/*Creates random image selection for banner*/
function getRandomImage()
{
    var images = [
        "http://vm-healdddev-casva.nga.gov//mediawiki/images/9/9f/0901_banner_2.jpg", 
        "http://vm-healdddev-casva.nga.gov/mediawiki/images/7/7e/0034.jpg",
        "http://vm-healdddev-casva.nga.gov/mediawiki/images/6/6f/0550.jpg",
        "http://vm-healdddev-casva.nga.gov/mediawiki/images/1/1d/1193.jpg"
    ];
    return images[Math.floor(Math.random() * images.length)];
}

$(document).ready(function(){
    $(".bannerWrapper").css({'background-image' : 'url(' + getRandomImage() + ')'}).addClass('fade-in');
});

/*Adds up button on scroll*/
$('body').prepend('<a href="#" class="back-to-top">Back to Top</a>');

var amountScrolled = 300;

$(window).scroll(function() {
	if ( $(window).scrollTop() > amountScrolled ) {
		$('a.back-to-top').fadeIn('slow');
	} else {
		$('a.back-to-top').fadeOut('slow');
	}
});