// Copyright (C) 2005 Ilya S. Lyubinskiy. All rights reserved.
// Technical support: http://www.php-development.ru/
//
// YOU MAY NOT
// (1) Remove or modify this copyright notice.
// (2) Distribute this code, any part or any modified version of it.
//     Instead, you can link to the homepage of this code:
//     http://www.php-development.ru/javascripts/dropdown.php.
//
// YOU MAY
// (1) Use this code on your website.
// (2) Use this code as a part of another product provided that
//     its main use is not creating javascript menus.
//
// NO WARRANTY
// This code is provided "as is" without warranty of any kind, either
// expressed or implied, including, but not limited to, the implied warranties
// of merchantability and fitness for a particular purpose. You expressly
// acknowledge and agree that use of this code is at your own risk.

// ***** Popup Control *********************************************************

function at_display(x)
{
	var win = window.open();
	for (var i in x) win.document.write(i+' = '+x[i]+'<br>');
}

// ***** Show Aux *****

function at_show_aux(parent, child)
{
	var p = document.getElementById(parent);
	var c = document.getElementById(child );

	var top  = (c["at_position"] == "y") ? p.offsetHeight+2 : 0;
	var left = (c["at_position"] == "x") ? p.offsetWidth +2 : 0;

	for (; p; p = p.offsetParent)
	{
		top  += p.offsetTop;
		left += p.offsetLeft;
	}

	c.style.position   = "absolute";
	c.style.top        = top-26+'px';
	c.style.left       = left+'px';
	c.style.visibility = "visible";
}

// ***** Show *****

function at_show()
{
	var p = document.getElementById(this["at_parent"]);
	var c = document.getElementById(this["at_child" ]);

	at_show_aux(p.id, c.id);

	clearTimeout(c["at_timeout"]);
}

// ***** Hide *****

function at_hide()
{
	var c = document.getElementById(this["at_child"]);
	
	c["at_timeout"] = setTimeout("document.getElementById('"+c.id+"').style.visibility = 'hidden'", 30);
}

// ***** Click *****

function at_click()
{
	var p = document.getElementById(this["at_parent"]);
	var c = document.getElementById(this["at_child" ]);

	if (c.style.visibility != "visible")
		at_show_aux(p.id, c.id);
	else c.style.visibility = "hidden";

	return false;
}

// ***** Attach *****

// PARAMETERS:
// parent   - id of visible html element
// child    - id of invisible html element that will be dropdowned
// showtype - "click" = you should click the parent to show/hide the child
//            "hover" = you should place the mouse over the parent to show
//                      the child
// position - "x" = the child is displayed to the right of the parent
//            "y" = the child is displayed below the parent
// cursor   - Omit to use default cursor or check any CSS manual for possible
//            values of this field

function at_attach(parent, child, showtype, position, cursor)
{
	var p = document.getElementById(parent);
	var c = document.getElementById(child);

	p["at_parent"]     = p.id;
	c["at_parent"]     = p.id;
	p["at_child"]      = c.id;
	c["at_child"]      = c.id;
	p["at_position"]   = position;
	c["at_position"]   = position;

	c.style.position   = "absolute";
	c.style.visibility = "hidden";


	switch (showtype)
	{
		case "click":
			p.onclick     = at_click;
			p.onmouseout  = at_hide;
			c.onmouseover = at_show;
			c.onmouseout  = at_hide;
		break;
		case "hover":
			p.onmouseover = at_show;
			p.onmouseout  = at_hide;
			c.onmouseover = at_show;
			c.onmouseout  = at_hide;
		break;
	}
}