function compare(data) {
	this.data = data;
}
compare.prototype.addToCompare = function(obj) {
	var SAPCode_e = obj.name.match(/tyre\[(.+)\]/);
	SAPCode_e = SAPCode_e ? SAPCode_e[1] : null;
	var id = obj.name.match(/disc\[(.+)\]/);
	id = id ? id[1] : null;
	var count = obj.value;
	new Ajax.Request('/ajaxcompare/', {
		parameters: {'cact': 'add', 'SAPCode_e': SAPCode_e, 'id': id, 'count': count},
		onComplete: function(tr) {
			this.data = tr.responseJSON;
			$('compare').getElementsBySelector('a')[0].innerHTML = this.data.msg;
		}.bind(this)
	});
}