Rende un elemento mobile

Moveable.Iframe.js

// --> Test https://jsfiddle.net/leonardo_ciaccio/60cxrgg4/1/

var 
	mouveable = function( ele ){

    var 
      selected = null

      ,x_pos = 0

      ,y_pos = 0

      ,x_ele = 0

      ,y_ele = 0

      ,_drag_init  = function( elem ){

        selected = elem;

        x_ele = x_pos - selected.offsetLeft;

        y_ele = y_pos - selected.offsetTop;

      }

      ,_move_elem = function( ev ){

        x_pos = document.all ? window.event.clientX : ev.pageX;

        y_pos = document.all ? window.event.clientY : ev.pageY;

        if( selected !== null ){

          selected.style.left = ( x_pos - x_ele ) + "px";

          selected.style.top = ( y_pos - y_ele ) + "px";

        }

      }

      ,_destroy = function() {

        selected = null;

      }
    ; 

    ele.onmousedown = function(){

      _drag_init( ele );

      return false;

    };

    document.onmousemove = _move_elem;

    document.onmouseup = _destroy;

  } 
;