function SwatForm(id, connection_close_url)
{
	this.id = id;
	this.form_element = document.getElementById(id);
	this.connection_close_url = connection_close_url;

	if (this.connection_close_url) {
		YAHOO.util.Event.on(this.form_element, 'submit', this.handleSubmit,
			this, true);
	}
}

SwatForm.prototype.setDefaultFocus = function(element_id)
{
	// TODO: check if another element in this form is already focused

	function isFunction(obj)
	{
		return (typeof obj == 'function' || typeof obj == 'object');
	}

	var element = document.getElementById(element_id);
	if (element && element.disabled == false && isFunction(element.focus))
		element.focus();
};

SwatForm.prototype.setAutocomplete = function(state)
{
	this.form_element.setAttribute('autocomplete', (state) ? 'on' : 'off');
};

SwatForm.prototype.closePersistentConnection = function()
{
	var is_safari_osx = /^.*mac os x.*safari.*$/i.test(navigator.userAgent);
	if (is_safari_osx && this.connection_close_url && XMLHttpRequest) {
		var request = new XMLHttpRequest();
		request.open('GET', this.connection_close_url, false);
		request.send(null);
	}
};

SwatForm.prototype.handleSubmit = function(e)
{
	if (this.form_element.enctype == 'multipart/form-data') {
		this.closePersistentConnection();
	}
};