function getStrErrAjax(status){

	var strStatus;
	
	switch(status){
		case 400:
			strStatus = "bad request";
			break;
		case 401:
			strStatus = "unauthorized";
			break;
		case 403:
			strStatus = "forbidden";
			break;
		case 404:
			strStatus = "not found";
			break;
		case 408:
			strStatus = "request timeout";
			break;
		case 410:
			strStatus = "gone";
			break;
		case 500:
			strStatus = "internal server error";
			break;
		case 502:
			strStatus = "bad gateway";
			break;
		case 503:
			strStatus = "service anavailable";
			break;
		default:
			var s = status.substring(0, 1);
			if(s == "4"){
				strStatus = "Cliente error";
			}
			else if(s == "5"){
				strStatus = "Server error";
			}
			else{
				strStatus = "Error: " + status;
			}
	}
	
	return strStatus;
	
}