// ************************************************************************
// * dropdown menus
// * (C) 2003 propellerhead
// * v0.2
// * 
// * History:
// * 17.12.03 creation of file
// * 28.12.03 making a php file to be able to serve different browsers
// *
// ************************************************************************ 	


// getObj: get an html object using the browsers preferred method	
function getObj(objid)
{
	if(document.all)
	{
		return "document.all."+objid;
	}
	return "document.getElementById(\""+objid+"\")";
}

var DD_MAX_HEIGHT = new Array();		// dropdown menu heights (fix)
var DD_HEIGHT = new Array();			// current dropdown heights
var IRO = new Array();					// dropdown interrupts (open)
var IRC = new Array();					// dropdown interrupts (close)
var TIO = new Array();					// dropdown timeouts
var IS_OPENABLE = new Array();
var DD_OPEN_SPEED = 1;					// opening speed. higher=slower
var DD_CLOSE_SPEED = 1;					// opening speed. higher=slower
var DD_OPEN_STEPS = 10;					// opening speed. higher=slower
var DD_CLOSE_STEPS = 10;				// opening speed. higher=slower

// colors and styles
var DD_SM_BGCOLOR_HIGHLIGHT = "#92C4E5";// dropdown submenu background color (when highlighted)
var DD_SM_BGCOLOR_NORMAL = "#82B4D5";	// dropdown submenu background color (when not highlighted)

// initialize values at startup
function init()
{
	// dump("Init()");
	// get number of menus while getting menu heights
	num_menus = 0;
	// get menu heights		
	curr_menu_obj = eval(getObj("ddt"+(num_menus+1)));
	while(curr_menu_obj)
	{
		DD_MAX_HEIGHT[num_menus+1] = curr_menu_obj.offsetHeight;
		DD_HEIGHT[num_menus+1] = 0;
		IS_OPENABLE[num_menus+1] = 1;
		// curr_menu_obj.style.clip = "rect(0 0 0 0)";
		// curr_menu_obj.style.visibility = "hidden"; // for Opera browsers. They can't do clips.
		curr_menu_obj.style.width = eval(getObj("hmp"+(num_menus+1))+".offsetWidth"); // this is just if the min. width of the ddmenu should be the width of its main menucolumn and is only neccessary for ns browsers
		++num_menus;
		curr_menu_obj = eval(getObj("ddt"+(num_menus+1)));			
	}
			
}

// activate menu entry
function actME(obj)
{
	obj.style.backgroundColor = DD_SM_BGCOLOR_HIGHLIGHT;
}
// deactivate menu entry
function deactME(obj)
{
	obj.style.backgroundColor = DD_SM_BGCOLOR_NORMAL;
}

function initOpenDd(ddnr)
{
	window.clearTimeout(TIO[ddnr]);
	eval(getObj("dddiv"+ddnr)+".style.visibility=\"visible\"");
	eval(getObj("dddiv"+ddnr)+".style.clip=\"rect(0px auto auto 0px)\""); // NN workaround: de-clip the thing (why is it clipped at all?)
	
	
	
	// for opera:
	// eval("document.all.ddt"+ddnr+".style.visibility=\"visible\";");
	
}

function procOpenDd(ddnr)
{
	if(IS_OPENABLE[ddnr] == 0)
	{
		if(DD_HEIGHT[ddnr] < DD_MAX_HEIGHT[ddnr])
		{
			DD_HEIGHT[ddnr] += DD_OPEN_STEPS;
			eval(getObj("dddiv"+ddnr)+".style.clip=\"rect(0px auto "+(DD_HEIGHT[ddnr])+"px 0px)\"");
		}
		else
		{
			window.clearInterval(IRO[ddnr]);
		}
	}
}

function initCloseDd(ddnr)
{
	TIO[ddnr] = setTimeout('eval(getObj(\"dddiv'+ddnr+'\")+\".style.visibility=\\\"hidden\\\"\");',100);
}

function DoCloseDd(ddnr)
{
	IS_OPENABLE[ddnr] = 1;
	IRC[ddnr] = window.setInterval("procCloseDd("+ddnr+")",DD_CLOSE_SPEED);
}

function procCloseDd(ddnr)
{
	if(DD_HEIGHT[ddnr] > 0)
	{
		DD_HEIGHT[ddnr] -= DD_CLOSE_STEPS;
		if(DD_HEIGHT[ddnr] < 0) { DD_HEIGHT[ddnr] = 0; } //?
		eval(getObj("dddiv"+ddnr)+".style.clip=\"rect(0px auto "+(DD_HEIGHT[ddnr])+"px 0px)\"");
	}
	else
	{
		DD_HEIGHT[ddnr] = 0; //?
		window.clearInterval(IRC[ddnr]);
		
		// for opera:
		// eval("document.all.ddt"+ddnr+".style.visibility=\"hidden\"");
	}
}