Codice PHP:
<html>
<head>
<meta charset="UTF-8">
<title>Pagina di prova</title>
<style>
body {
margin: 0px;
}
.free {
position: absolute;
margin-left: auto;
margin-right: auto;
width: 100%;
height: 100%;
overflow: hidden;
cursor: crosshair;
}
.free:active {
cursor: move;
}
</style>
<script type="text/javascript">
!function(e,n){"function"==typeof define&&define.amd?define(["exports"],n):n("undefined"!=typeof exports?exports:e.dragscroll={})}(this,function(e){var n=window,o=document,t="mousemove",l="mouseup",i="mousedown",r="EventListener",c="add"+r,f="remove"+r,m=[],s=function(e,r){for(e=0;e<m.length;)r=m[e++],r[f](i,r.md,0),n[f](l,r.mu,0),n[f](t,r.mm,0);for(m=o.getElementsByClassName("dragscroll"),e=0;e<m.length;)!function(e,o,r,f){e[c](i,e.md=function(e){f=1,o=e.clientX,r=e.clientY,e.preventDefault(),e.stopPropagation()},0),n[c](l,e.mu=function(){f=0},0),n[c](t,e.mm=function(n,t){t=e.scroller||e,f&&(t.scrollLeft-=-o+(o=n.clientX),t.scrollTop-=-r+(r=n.clientY))},0)}(m[e++])};"complete"==o.readyState?s():n[c]("load",s,0),e.reset=s});
</script>
</head>
<body>
<div class="free dragscroll">
<img src="http://www.planwallpaper.com/static/images/6944150-abstract-colors-wallpaper.jpg">
</div>
</body>
</html>