//Generic Drag Script- © Dynamic Drive (www.dynamicdrive.com)
//For full source code and terms of usage,
//visit http://www.dynamicdrive.com

var ie=document.all;
var ns6=document.getElementById&&!document.all;

var dragapproved=false;
var z,x,y;


function move(e){/*funzione modificata da Mich di html.it*/
  if (dragapproved){
    z.style.left=ns6? temp1+e.clientX-x+'px': temp1+event.clientX-x
    z.style.top=ns6? temp2+e.clientY-y+'px': temp2+event.clientY-y
    return false
  }
}



function drags(e)

{
if (!ie&&!ns6)
return
var firedobj=ns6? e.target : event.srcElement
var topelement=ns6? "html" : "body"
/*
while (firedobj.tagName!=topelement&&firedobj.className!="drag"){
firedobj=ns6? firedobj.parentNode : firedobj.parentElement
}
tolto per errore segalato nelle console
*/
while (firedobj.tagName!=topelement.toUpperCase() && firedobj.className!="drag"){
firedobj=ns6? firedobj.parentNode : firedobj.parentElement
}

//trovato da http://www.dynamicdrive.com/dynamicindex11/abox_dev.htm e aggiunto in sostiuzione - sembra funzionare senza segnalazione di errore in console.
if (firedobj.className=="drag"){
dragapproved=true
z=firedobj
temp1=parseInt(z.style.left+0)
temp2=parseInt(z.style.top+0)
x=ns6? e.clientX: event.clientX
y=ns6? e.clientY: event.clientY
document.onmousemove=move
return false
}
}

document.onmousedown=drags
document.onmouseup=new Function("dragapproved=false")