function validarUsuario(form)
{
	if (!isEmail(form.usuario.value))
	{
		alert("El e-mail que has introducido no es válido");
		form.usuario.focus();
		return false;
	}
	
	if (form.clave.value=="")
	{
		alert("La contraseña no puede estar vacía");
		form.clave.focus();
		return false;
	}
	
	return true;
}

function busRapida()
{
	var form = document.formBusRapida;
		
	if (form.palabrasBusqueda.value=="")	
	{
		alert("Introduce las palabras de búsqueda");
		form.palabrasBusqueda.focus();
		return false;
	}
	
	if (form.tipoBus.selectedIndex < 0)
	{
		alert("Elige el campo de búsqueda");
		form.tipoBus.focus();
		return false;
	}
	
	return true;
}

function abre_ventana(elemento, ancho, alto, scroll)
{
	var ventana=window.open(elemento.href, "_blank", "width="+ancho+"px, height="+alto+"px, scrollbars="+scroll);
	return ventana==undefined;
}


/*javascript for Bubble Tooltips by Alessandro Fulciniti
- http://pro.html.it - http://web-graphics.com */

function enableTooltips(id){
var links,i,h;
if(!document.getElementById || !document.getElementsByTagName) return;
//AddCss();
h=document.createElement("span");
h.id="btc";
h.setAttribute("id","btc");
h.style.position="absolute";
document.getElementsByTagName("body")[0].appendChild(h);
mapa = document.getElementById("mapa-puntos");
mapa.removeAttribute("alt");

if(id==null) links=document.getElementsByTagName("area");
else links=document.getElementById(id).getElementsByTagName("area");
for(i=0;i<links.length;i++){
    Prepare(links[i]);
    }
}

function Prepare(el){
var tooltip,t,b,s,l;
t=el.getAttribute("alt");
//if(t==null || t.length==0) t="link:";
el.removeAttribute("title");
el.removeAttribute("alt");
tooltip=CreateEl("span","tooltip");
s=CreateEl("span","top");
s.appendChild(document.createTextNode(t));
tooltip.appendChild(s);
b=CreateEl("b","bottom");
//l=el.getAttribute("href");
//if(l.length>30) l=l.substr(0,27)+"...";
//b.appendChild(document.createTextNode(l));
tooltip.appendChild(b);
setOpacity(tooltip);
el.tooltip=tooltip;
el.onmouseover=showTooltip;
el.onmouseout=hideTooltip;
el.onmousemove=Locate;
}

function showTooltip(e){
document.getElementById("btc").appendChild(this.tooltip);
Locate(e);
}

function hideTooltip(e){
var d=document.getElementById("btc");
if(d.childNodes.length>0) d.removeChild(d.firstChild);
}

function setOpacity(el){
el.style.filter="alpha(opacity:95)";
el.style.KHTMLOpacity="0.95";
el.style.MozOpacity="0.95";
el.style.opacity="0.95";
}

function CreateEl(t,c){
var x=document.createElement(t);
x.className=c;
x.style.display="block";
return(x);
}

//function AddCss(){
//var l=CreateEl("link");
//l.setAttribute("type","text/css");
//l.setAttribute("rel","stylesheet");
//l.setAttribute("href","bt.css");
//l.setAttribute("media","screen");
//document.getElementsByTagName("head")[0].appendChild(l);
//}

function Locate(e){
var posx=0,posy=0;
if(e==null) e=window.event;
if(e.pageX || e.pageY){
    posx=e.pageX; posy=e.pageY;
    }
else if(e.clientX || e.clientY){
    if(document.documentElement.scrollTop){
        posx=e.clientX+document.documentElement.scrollLeft;
        posy=e.clientY+document.documentElement.scrollTop;
        }
    else{
        posx=e.clientX+document.body.scrollLeft;
        posy=e.clientY+document.body.scrollTop;
        }
    }
document.getElementById("btc").style.top=(posy-27)+"px";
document.getElementById("btc").style.left=(posx-17)+"px";
}

window.onload=function(){enableTooltips()};