ludder

/**
 * Get parent node for given tagname
 * @param  {Object} node    DOM node
 * @param  {String} tagname HTML tagName
 * @return {Object}         Parent node
 */
function getParentByTagName(node, tagname) {
	var parent;
	if (node === null || tagname === '') return;
	parent  = node.parentNode;

scottjehl

/*!
 An experiment in getting accurate visible viewport dimensions across devices
 (c) 2012 Scott Jehl. 
 MIT/GPLv2 Licence
*/

function viewportSize(){
	var test = document.createElement( "div" );

	test.style.cssText = "position: fixed;top: 0;left: 0;bottom: 0;right: 0;";

mathiasbynens

// Original code from http://www.blog.highub.com/mobile-2/a-fix-for-iphone-viewport-scale-bug/

var metas = document.getElementsByTagName('meta');
var i;
if (navigator.userAgent.match(/iPhone/i)) {
	for (i=0; i<metas.length; i++) {
		if (metas[i].name == "viewport") {
			metas[i].content = "width=device-width, minimum-scale=1.0, maximum-scale=1.0";
		}
	}