gistfile1.js

// validate all the fields in the form
validateForm:function() {
	this.resetForm();
	this.fields.each(function(field) {
		this.validateField(field);
	}.bind(this));
	return this.hasErrors() ? false : true;
},

// validate a specific field
validateField:function(e) {
	// is this being called as the result of an event being fired, or did we call it directly?
	var obj = Event.element(e) ? Event.element(e) : $(e);
	var fields = this.fields.select(function(field) {
		return obj == field.obj ? true : false;
	});

	if(fields) {
		this.resetField(fields[0]);
		// for each field that matched, first check to see if it already has an error and if not, then validate
		fields.each(function(field) {
			if(!this.fieldHasErrors(field)) {
				if(field.method($F(field.obj))) {
					this.setFieldAsValid(field);
				} else {
					this.setFieldAsError(field);
				}
			}
		}.bind(this));
	}
},