function goAjax(add, metodo, div, url, parametros)
{	
	$(div).innerHTML = '<div ><center><img src="'+PHP_RELATIVE_PATH+'VISTA/themes-account/default/img/loading.gif" width="200px"></center></div>';
	if(add!=1)
	{
		  new Ajax.Updater(div, url, 
						   { sanitizeJSON: true, asynchronous: false, method: 'post', parameters: parametros});
	}
	else if(add==1)
	{
		  new Ajax.Updater(div, url, 
						   { sanitizeJSON: true, asynchronous: false, method: 'post', parameters: parametros, insertion: Insertion.Top});
	}
	else if(add==2)
	{
		  new Ajax.Updater(div, url, 
						   { sanitizeJSON: true, asynchronous: false, method: 'post', parameters: parametros, insertion: Insertion.bottom});
	}	
}