function onlyInt(event) {
  var regex = new RegExp("^[0-9\b]+$");
  if(event.charCode == 0){ return true; }
  var key = String.fromCharCode(!event.charCode ? event.which : event.charCode);
  if (!regex.test(key)) {
    event.preventDefault();
    return false;
  }
}
function nowhiteRFC(event) {
	var regex = new RegExp("^[a-zA-Z0-9&\b]*$");
    if(event.charCode == 0){ return true; }
    var key = String.fromCharCode(!event.charCode ? event.which : event.charCode);
  	if (!regex.test(key)) {
    	event.preventDefault();
    	return false;
  	}
}
function noEspacio(event){
    if(event.charCode == 32){
      event.preventDefault();
      return false; 
    }
}
function removeme(obj){
  $(obj).remove();
}