// shortcuts for Yahoo! UI Library (should be loaded before this file)
var y = YAHOO.util;
var ya = y.Anim;
var yc = y.Connect;
var yd = y.Dom;
var ye = y.Event;

/* Dirty hack because safari can't do a request within a 
	request using asyncRequest */
try {
	y.Connect.delayedAsyncRequest = function(method, url, todo, args) {
		setTimeout(function() {
			yc.asyncRequest(method, url, todo, args);
		},1);
	};
}
catch(e) { }

// ajax defaults
var ajax_timeout = 20000;    // in ms, so 20 seconds
var ajax_error = function(res, msg, caller_name) {
	if ((msg == null) || (msg == '')) {
		msg = 'Sorry! Looks like our system choked. Please give it another shot. If you get hosed twice, contact customer service for assistance.';
	}
	if ((caller_name != null) && (caller_name != '')) {
		var err_str = caller_name + ' : ' + res.status + ' : ' + res.statusText;
	}
	else {
		var err_str = res.status + ' : ' + res.statusText;
	}
	alert(msg + '\n\n (' + err_str + ')');

	// Attempt to send information about the error
	try {
		// Gather info for submit
		var arguments = '';
		if (res.argument) {
			arguments = res.argument.join("\n");
		}
		var args = {
			session_id:       _readCookie("MV_SESSION_ID") || '',
			document_url:     document.URL || '',
			window_location:  window.location || '',
			stack:            BC.util.debug.stackTrace() || '',
			err_str:          err_str || '',
			r_argument:       arguments,
			r_status:         res.status || '',
			r_responseheader: res.getAllResponseHeaders || ''
		};

		// Convert object to url query param
		var params = new Array();
		for (var i in args) params.push(i+'='+escape(args[i]));
		var params_string = params.join("&");

		var error_url = "/docs/ajax_error.html?"+params_string;

		// We don't need a response back or anything, so just go directly to the url
		var i = new Image();
		i.src = error_url;
	}
	catch(e) { }
}

// mimic prototype.js $() function
var $ = function(el_id) { return yd.get(el_id); }

// mimic prototype.js $F() function
var $F = function(form, name) { return eval('document.' + form + '.' + name + '.value'); }

// version of $F that can submit multiple selects, returned as pipe delimited
var $M = function(form, name) {
	var selected_fields = '';
	var e = eval('document.' + form + '.' + name);
	for (var i = 0; i < e.options.length; i++) {
		if (e.options[i].selected) {
			if (selected_fields != '') {
				selected_fields += '|';
			}
			selected_fields += e.options[i].value;
		}
	}
	return selected_fields;
}

// version of $F that can submit array elements, returned as pipe delimited
var $Q = function(form, name) {
	var selected_fields = '';
	var e = eval('document.' + form + '.' + name);
	if (e[0]) {
		for (var i = 0; i < e.length; i++) {
			if (selected_fields != '') {
				selected_fields += '|';
			}
			selected_fields += e[i].value;
		}
	}
	else {
		selected_fields = e.value;
	}
	return selected_fields;
}

// clear an input field
var FieldClear = function(form, name) { eval('document.' + form + '.' + name + '.value = "";'); }

var fade_duration = 0.3;
var fade_method = '';

var fade = function(el_id, opac, on_complete, on_start, display_none)  {
    var oAnim = new y.Anim(el_id, { opacity: opac }, fade_duration, fade_method);
    if(on_complete) oAnim.onComplete.subscribe(on_complete);
	if(display_none) {
		oAnim.onComplete.subscribe(function() {
			yd.setStyle(el_id, 'display', 'none');
		});
	}   
	if(on_start) oAnim.onStart.subscribe(on_start);
    oAnim.animate();
}

// fade opacity from invisible to fully visible
var fade_in = function(el_id, on_complete, on_start) {
    fade(el_id, { from: 0, to: 1 }, on_complete, on_start);
}

// fade opacity from fully visible to invisible
var fade_out = function(el_id, on_complete, on_start, display_none) {
    fade(el_id, { from: 1, to: 0 }, on_complete, on_start, display_none);
}

// simple fade in or out toggle
var fade_in_out_toggle = function(el_id, on_complete_in, on_complete_out) {
	if(yd.getStyle(el_id, 'display') == 'none') { fade_in(el_id, on_complete_in); }
	else { fade_out(el_id, on_complete_out); }
}

// fade in, but turns css display (hiding) on first
var fade_on = function(el_id, on_complete, on_start) {
	yd.setStyle(el_id, 'opacity', 0);
	yd.setStyle(el_id, 'display', '');
	fade_in(el_id, on_complete, on_start);
}

// fade out, turning off css display when complete
var fade_off = function(el_id, on_complete, on_start) {
	fade_out(el_id, on_complete, on_start, 1);
}

// simple fade on or off toggle
var fade_on_off_toggle = function(el_id, on_complete_on, on_complete_off) {
	if(yd.getStyle(el_id, 'display') == 'none') { fade_on(el_id, on_complete_on); }
	else { fade_off(el_id, on_complete_off); }
}

// ajax call, pass url, form cgi var args, oncomplete function ref, method (post or get, optional)
var ajax = function(url, args, todo, method, fail, time) {
	var mthd = method || 'POST';
	var cb = { success: todo, failure: fail, timeout: time }
	var cObj = yc.asyncRequest(mthd, url, cb, args);
}