Edit in JSFiddle

Result
JavaScript
CSS
HTML

$(document).ready(function(){
 $(".fullscreen_button").on("click", function() 
 {
  document.fullScreenElement && null !== document.fullScreenElement || !document.mozFullScreen && !document.webkitIsFullScreen ? document.documentElement.requestFullScreen ? document.documentElement.requestFullScreen() : document.documentElement.mozRequestFullScreen ? document.documentElement.mozRequestFullScreen() : document.documentElement.webkitRequestFullScreen && document.documentElement.webkitRequestFullScreen(Element.ALLOW_KEYBOARD_INPUT) : document.cancelFullScreen ? document.cancelFullScreen() : document.mozCancelFullScreen ? document.mozCancelFullScreen() : document.webkitCancelFullScreen && document.webkitCancelFullScreen()
 });	
});

<input type="button" class="fullscreen_button" value="フルスクリーン表示する！">