function window_open(psURL,psName,pnWidth,pnHeight,pnTop,pnLeft,pbScroll){
	var nLeft=pnLeft || Math.round((window.screen.width-pnWidth)/2);
	var nTop=pnTop || Math.round((window.screen.height-pnHeight)/2)-20;	
	if (psName=="") psName=null;
	var oWindow=window.open(psURL,psName,"top="+nTop+",left="+nLeft+",height="+pnHeight+",width="+pnWidth+",status=no,toolbar=no,menubar=no,location=no,resizable=no"+((pbScroll)?",scrollbars=yes":""));
	oWindow.focus();
}
function js_trim(ps_cadena){
//Quita los espacios al inicio y al final de una cadena (ps_cadena)
	return(ps_cadena.replace(/(^\s+)|(\s+$)/g,""));
}
function ns_reload(){
	document.location.href=document.location.href
}
function validar()
{
	if ( document.formulario.Email.value=="" )
	{
		alert ("Falta algún campo obligatorio");
		return false;
	}
	if (CheckMail(document.formulario.Email))
		return true;
	else
	{
		alert("Por favor, introduzca una direccion de correo electronica valida")
		return false;
	}
}
function CheckMail(field)
{
 return field.value.match(/\b(^(\S+@).+((\.com)|(\.net)|(\.edu)|(\.mil)|(\.gov)|(\.org)|(\..{2,2}))$)\b/gi);
}
function ventanaSecundaria (URL){ 
   window.open(URL,"Factura","width=760,height=350,scrollbars=YES,resizable=YES") 
}