function nuevaventana(thePage,name,wt,ht,sc,res){ 
	leftPos= (screen.width-wt)/6 
	topPos = (screen.height-ht)/6 
	eval("win_"+name+" = window.open(thePage,name,'toolbars=yes, resizable='+res+',scrollbars="+sc+",left="+leftPos+",top="+topPos+",width="+wt+",height="+ht+"')");
} 


function enviar_contacto()
{
   var nombre=document.forms[0].nombre.value;
   var apellidos=document.forms[0].apellidos.value;
   var email=document.forms[0].email.value;
   var fax= document.forms[0].fax.value;
   var comentarios= document.forms[0].comentarios.value;

	if ((nombre == "") || (apellidos == "") || (fax == "") || (comentarios == "") || (email == "")){
		alert("Debe rellenar todos los campos obligatorios");

	}else{
		 if ((email != "") && (document.forms[0].email.value.indexOf('@',0) == -1)){
			alert("La dirección de correo electrónico no es válida");
		 }
		 else{
			document.forms[0].submit();  
		 }
	}
}