Daniel@0: /**
Daniel@0:  * ScrollFix v0.1
Daniel@0:  * http://www.joelambert.co.uk
Daniel@0:  *
Daniel@0:  * Copyright 2011, Joe Lambert.
Daniel@0:  * Free to use under the MIT license.
Daniel@0:  * http://www.opensource.org/licenses/mit-license.php
Daniel@0:  */
Daniel@0: 
Daniel@0: var ScrollFix = function(elem) {
Daniel@0:     // Variables to track inputs
Daniel@0:     var startY, startTopScroll;
Daniel@0:     
Daniel@0:     elem = elem || document.querySelector(elem);
Daniel@0:     
Daniel@0:     // If there is no element, then do nothing  
Daniel@0:     if(!elem)
Daniel@0:         return;
Daniel@0: 
Daniel@0:     // Handle the start of interactions
Daniel@0:     elem.addEventListener('touchstart', function(event){
Daniel@0:         startY = event.touches[0].pageY;
Daniel@0:         startTopScroll = elem.scrollTop;
Daniel@0:         
Daniel@0:         if(startTopScroll <= 0)
Daniel@0:             elem.scrollTop = 1;
Daniel@0: 
Daniel@0:         if(startTopScroll + elem.offsetHeight >= elem.scrollHeight)
Daniel@0:             elem.scrollTop = elem.scrollHeight - elem.offsetHeight - 1;
Daniel@0:     }, false);
Daniel@0: };