function chapa(a,max,msg){
	a.value=a.value.substr(0,max-1)
	document.getElementById(msg).innerHTML=-1+max-a.value.length+' caracteres';
}

function oculta_msg(id)
{
	try { 
		$('#'+id).fadeOut('fast', function () {
			document.getElementById(id).parentNode.innerHTML='';
		} );

		setTimeout( "document.getElementById('"+id+"').parentNode.innerHTML=''", 1000);	
		 
	} catch(e) {} 
}

function cierra_msg(id){
	if( jQuery){
		setTimeout( "oculta_msg('"+id+"')"  , 10000);	
	}
}