function exchange(id_g, id_com) {
	u = $('euser').value;
	e = $('eemail').value;

	if (u.length || e.length) {
		var myAjax = new Ajax.Request(
			'/account/myGifts/exchange.php',
			{method: 'get', parameters: 'ajax=true&idc='+id_com+'&idg='+id_g+(u.length?'&u='+u:'')+(e.length?'&e='+e:''),
			onSuccess: function (fcheck){
				var repp = fcheck.responseText;
				eval(repp);
				$('ex_er').innerHTML = error;
			}
		});
	}
}