function preload() {
  var d=document; if(d.images){ if(!d.MM_p) d.MM_p=new Array();
    var i,j=d.MM_p.length,a=preload.arguments; for(i=0; i<a.length; i++)
    if (a[i].indexOf("#")!=0){ d.MM_p[j]=new Image; d.MM_p[j++].src=a[i];}}
}

function rollOut() {
  var i,x,a=document.MM_sr; for(i=0;a&&i<a.length&&(x=a[i])&&x.oSrc;i++) x.src=x.oSrc;
}

function findObj(n, d) {
  var p,i,x;  if(!d) d=document; if((p=n.indexOf("?"))>0&&parent.frames.length) {
    d=parent.frames[n.substring(p+1)].document; n=n.substring(0,p);}
  if(!(x=d[n])&&d.all) x=d.all[n]; for (i=0;!x&&i<d.forms.length;i++) x=d.forms[i][n];
  for(i=0;!x&&d.layers&&i<d.layers.length;i++) x=findObj(n,d.layers[i].document);
  if(!x && d.getElementById) x=d.getElementById(n); return x;
}

function rollOver() {
  var i,j=0,x,a=rollOver.arguments; document.MM_sr=new Array; for(i=0;i<(a.length-2);i+=3)
   if ((x=findObj(a[i]))!=null){document.MM_sr[j++]=x; if(!x.oSrc) x.oSrc=x.src; x.src=a[i+2];}
}

function getURL() {
  var i, args=getURL.arguments; document.val = false;
  for (i=0; i<(args.length-1); i+=2) eval(args[i]+".location='"+args[i+1]+"'");
}

// tween y
function tween_y(element, posy) {
	new Effect.Move(element, { y: posy, transition: Effect.Transitions.sinoidal });
}

// tween x
function tween_x(element, posx) {
	new Effect.Move(element, { y: posx, transition: Effect.Transitions.spring });
}

// fade
function tejar(element){
	$(element).fade();	
}

function view(element){
	$(element).appear();
}

// alpha

function alpha(element, start, end, time){
	new Effect.Opacity(element, { from: start, to: end, duration: time });
}