function MM_preloadImages() { //v3.0
  var d=document; if(d.images){ if(!d.MM_p) d.MM_p=new Array();
    var i,j=d.MM_p.length,a=MM_preloadImages.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 MM_findObj(n, d) { //v4.01
  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=MM_findObj(n,d.layers[i].document);
  if(!x && d.getElementById) x=d.getElementById(n); return x;
}

MM_preloadImages('img/menu/02_vitnik_b.jpg','img/menu/04_contacto_b.jpg','img/menu/01_home_b.jpg','img/menu/03_catalogo_b.jpg')

function MM_swapImgRestore() { //v3.0
  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 MM_swapImage() { //v3.0
  var i,j=0,x,a=MM_swapImage.arguments; document.MM_sr=new Array; for(i=0;i<(a.length-2);i+=3)
   if ((x=MM_findObj(a[i]))!=null){document.MM_sr[j++]=x; if(!x.oSrc) x.oSrc=x.src; x.src=a[i+2];}
}

function Mostrar(txt) {
	for(a=1;a<=5;a++) document.getElementById("txt"+a).style.display="none";

	document.getElementById(txt).style.display="";

}

function MM_validateForm(formulario) { //v4.0
 	//formulario.btnEnviar.disabled=true;
	document.getElementById("Errores").innerHTML=""
	txt_errores="";
	
	for (var i = 0; i < formulario.elements.length; i++) {
		if (formulario.elements[i].type == "text" || formulario.elements[i].type == "textarea") {
			formulario.elements[i].style.backgroundColor="#DEE9EB";
		}
	}
	
	if (!tieneDatos(formulario.Nombre.value)) {
		txt_errores+="- Escriba su Nombre<br />";
		formulario.Nombre.style.backgroundColor="#FFD9D9";
	}
	if(!isEmailAddress(formulario.e_mail)) {
		txt_errores+="- Escriba su Mail correctamente<br />";
		formulario.e_mail.style.backgroundColor="#FFD9D9";
	}

	if (!tieneDatos(formulario.Asunto.value)) {
		txt_errores+="- Escriba un Asunto<br />";
		formulario.Asunto.style.backgroundColor="#FFD9D9";
	}
	if (!tieneDatos(formulario.Comentarios.value)) {
		txt_errores+="- Escriba su Comentario<br />";
		formulario.Comentarios.style.backgroundColor="#FFD9D9";
	}
	if(txt_errores!="") {
		//formulario.btnEnviar.disabled=false;
		document.getElementById("Errores").innerHTML="<strong>Han ocurrido los siguientes Errores: </strong><br />"+txt_errores+"<br />";
		
	}
  document.MM_returnValue = (txt_errores == '');
}
function tieneDatos(Valor) { 
 for (var i=0; i<Valor.length; i++) { 
   if ((" \t\n\r").indexOf(Valor.charAt(i))==-1) return true; 
   } 
 return false; 
}

function isEmailAddress(theElement)
{
	var s = theElement.value;
	var filter=/^[A-Za-z][A-Za-z0-9_.-]*@[A-Za-z0-9_]+\.[A-Za-z0-9_.]+[A-za-z]$/;
	if (s.length == 0 ) return false;
	if (filter.test(s)){
		return true;
	}else{
		return false;
	}
}