var ultClick = "";
var desc = "";
var nombre="";
var col="";
var temp = new Image()
var loc
var gotit
function checkit()
{
        if ((navigator.appName=="Microsoft Internet Explorer")
        && (parseInt(navigator.appVersion) >= 4))
        return
        else
        alert("Necesario Internet Explorer 4 o superior")
}
function exch()
{
        if ((event.button == 1) && (event.srcElement.className == "drag"))
        {
                 if (gotit == 1)
                {
                        gotit = 0
document.images[loc].src = document.images[event.srcElement.name].src
document.images[event.srcElement.name].src = temp.src
                }
                else
                {
                        gotit = 1
                        loc = event.srcElement.name
                        temp.src = document.images[loc].src
                }
        }
}
document.onmousedown=exch




function menup(id){
var punto=id;
punto= document.getElementById(""+id+"").classname;
punto.className="tdu";
alert(punto.classname);
//alert(otro);
}
function sel(id) {
  document.selection.empty();
   
  
   document.id.style.background="url(imagenes/z/zonabs.gif)"
	
}


function unsel(id) {
  document.selection.empty();
  document.id.style.background="url(imagenes/z/zonab.gif)"
}