Touch code for deag and drop

var dragRevert = true;
var uagent = navigator.userAgent.toLowerCase();
var platformAgent = navigator.platform.toLowerCase();





function init(){
var a=0;
$(".vdrag").each(function(){
var b=$(this).attr("id");
var c=document.getElementById(b);
a++;
c.addEventListener("touchstart",touchHandler,true);
c.addEventListener("touchmove",function(e){e.preventDefault();},true);
c.addEventListener("touchmove",touchHandler,true);
c.addEventListener("touchend",touchHandler,true);
c.addEventListener("touchcancel",touchHandler,true);
});
}

function touchHandler(a){
var b=a.changedTouches,c=b[0],d="";
switch(a.type){
case"touchstart":
d="mousedown";
break;
case"touchmove":
d="mousemove";
break;
case"touchend":
d="mouseup";
break;
default:
return
}
var e=document.createEvent("MouseEvent");
e.initMouseEvent(d,true,true,window,1,c.screenX,c.screenY,c.clientX,c.clientY,false,false,false,false,0,null);
c.target.dispatchEvent(e);
}


function is_touch_device() {
 if (navigator.platform == 'iPad' || navigator.platform == 'iPhone' || navigator.platform == 'iPod' || (uagent.search('android') > -1) || (uagent.search('android') > -1)|| (platformAgent.search('android')>-1) || (platformAgent.search('linux')>-1)){
  return true;
 }else{
  return false;
 }
}