enlarge.touch.min.js

/*
    enlarge.touch.js
    by AbelYao, USKY.ORG
*/
(function(e,t){var n=["touchstart","touchmove","touchend"];e.enlarge=function(e,t,i){var s=document.getElementById(e);var a=s.getElementsByTagName("img")[0];var o={x:a.width/(t-a.width),y:a.height/(i-a.height)};s.style.overflow="hidden";s.style.position="relative";s.innerHTML+='<img src="'+s.href+'">';var l=s.getElementsByTagName("img")[1];l.style.position="absolute";l.style.left="0px";l.style.top="0px";l.style.width=t+"px";l.style.height=i+"px";l.style.display="none";s.onclick=function(){return false};var d=function(e){e.preventDefault();var t=e.changedTouches[0].pageX-s.offsetLeft;var n=e.changedTouches[0].pageY-s.offsetTop;if(t<0)t=0;if(n<0)n=0;if(t>a.width)t=a.width;if(n>a.height)n=a.height;l.style.display="block";l.style.left=0-t/o.x+"px";l.style.top=0-n/o.y+"px"};var h=function(){l.style.display="none"};s.addEventListener(n[0],d);s.addEventListener(n[1],d);s.addEventListener(n[2],h);l.addEventListener(n[1],d);l.addEventListener(n[2],h)}})(window);