/*
	[JspRun!] (C)2007-2009 JspRun Inc.
	This is NOT a freeware, use is subject to license terms

	$RCSfile: menu.js,v $
	$Revision: 1.1 $
	$Date: 2009/08/12 16:36:10 $
*/

var jsmenu = new Array();
var ctrlobjclassName;
jsmenu['active'] = new Array();
jsmenu['timer'] = new Array();
jsmenu['iframe'] = new Array();

function initCtrl(ctrlobj, click, duration, timeout, layer) 
{
	if(ctrlobj && !ctrlobj.initialized) 
	{
		ctrlobj.initialized = true;
		ctrlobj.unselectable = true;

		ctrlobj.outfunc = typeof ctrlobj.onmouseout == 'function' ? ctrlobj.onmouseout : null;
		
		ctrlobj.onmouseout = function() 
		{
			if(this.outfunc) 
			{
			   this.outfunc();
			}
			if(duration < 3) 
			{
			   jsmenu['timer'][ctrlobj.id] = setTimeout('hideMenu(' + layer + ')', timeout);
			}
		}
		if(click && duration) 
		{
			ctrlobj.clickfunc = typeof ctrlobj.onclick == 'function' ? ctrlobj.onclick : null;
			ctrlobj.onclick = function (e) 
			{
				doane(e);
				if(jsmenu['active'][layer] == null || jsmenu['active'][layer].ctrlkey != this.id) 
				{
					if(this.clickfunc)
					{
					   this.clickfunc();
					}
					else 
					{
					   showMenu(this.id, true);
					}
				} 
				else 
				{
					hideMenu(layer);
				}
			}
		}

		ctrlobj.overfunc = typeof ctrlobj.onmouseover == 'function' ? ctrlobj.onmouseover : null;
		ctrlobj.onmouseover = function(e) 
		{
			doane(e);
			if(this.overfunc) 
			{
			    this.overfunc();
			}
			if(click) 
			{
				clearTimeout(jsmenu['timer'][this.id]);
			} 
			else 
			{
				for(var id in jsmenu['timer']) 
				{
					if(jsmenu['timer'][id]) 
					{
					    clearTimeout(jsmenu['timer'][id]);
					}
				}
			}
		}
	}
	
}

function initMenu(ctrlid, menuobj, duration, timeout, layer) 
{
	
	if(menuobj && !menuobj.initialized) 
	{
		menuobj.initialized = true;
		menuobj.ctrlkey = ctrlid;
		menuobj.onclick = ebygum;
		menuobj.style.position = 'absolute';
		if(duration < 3) 
		{
			if(duration > 1) 
			{
				menuobj.onmouseover = function() 
				{
					clearTimeout(jsmenu['timer'][ctrlid]);
				}
			}
			if(duration != 1) 
			{
				menuobj.onmouseout = function() 
				{
					jsmenu['timer'][ctrlid] = setTimeout('hideMenu(' + layer + ')', timeout);
				}
			}
		}
		menuobj.style.zIndex = 50;
		if(is_ie) 
		{
			//menuobj.style.filter += "progid:DXImageTransform.Microsoft.shadow(direction=135,color=#CCCCCC,strength=2)";
		}
	}
}

//ÏÔʾÏÂÀ­²Ëµ¥
function showMenu(ctrlid, click, offset, duration, timeout, layer, showid, maxh) 
{
	e = window.event ? window.event : showMenu.caller.arguments[0];
	//alert(e);
	var ctrlobj = $(ctrlid);
	if(!ctrlobj)
	{
	    return;
	}
	if(isUndefined(click))
	{
	    click = false;
	}
	if(isUndefined(offset))
	{
	    offset = 0;
	}
	if(isUndefined(duration))
	{
	    duration = 2;
	}
	if(isUndefined(timeout)) 
	{
	    timeout = 5;
	}
	if(isUndefined(layer)) 
	{
	    layer = 0;
	}
	if(isUndefined(showid)) 
	{
	    showid = ctrlid;
	}
	var showobj = $(showid);
	var menuobj = $(showid + '_menu');
	
	
	if(!showobj|| !menuobj) 
	{
	    return;
	}
	if(isUndefined(maxh)) 
	{
	    maxh = 400;
	}
	hideMenu(layer);
    for(var id in jsmenu['timer']) 
	{
	    if(jsmenu['timer'][id]) 
		{
		    clearTimeout(jsmenu['timer'][id]);
		}
	}
	initCtrl(ctrlobj, click, duration, timeout, layer);
	ctrlobjclassName = ctrlobj.className;
	ctrlobj.className += ' hover';
	
	initMenu(ctrlid, menuobj, duration, timeout, layer);
	menuobj.style.display = '';
	if(!is_opera) 
	{
		//menuobj.style.clip = 'rect(auto, auto, auto, auto)';
	}

	setMenuPosition(showid, offset);
   
	if(is_ie && is_ie < 7) 
	{
		if(!jsmenu['iframe'][layer]) 
		{
			var iframe = document.createElement('iframe');
			iframe.style.display = 'none';
			iframe.style.position = 'absolute';
			iframe.style.filter = 'progid:DXImageTransform.Microsoft.Alpha(style=0,opacity=0)';
			$('append_parent') ? $('append_parent').appendChild(iframe) : menuobj.parentNode.appendChild(iframe);
			jsmenu['iframe'][layer] = iframe;
		}
		jsmenu['iframe'][layer].style.top = menuobj.style.top;
		jsmenu['iframe'][layer].style.left = menuobj.style.left;
		jsmenu['iframe'][layer].style.width = menuobj.w;
		jsmenu['iframe'][layer].style.height = menuobj.h;
		jsmenu['iframe'][layer].style.display = 'block';
	}

	if(maxh && menuobj.scrollHeight > maxh) 
	{
		menuobj.style.height = maxh + 'px';
		if(is_opera) 
		{
			menuobj.style.overflow = 'auto';
		}
		else 
		{
			menuobj.style.overflowY = 'auto';
		}
	}

	if(!duration) 
	{
		setTimeout('hideMenu(' + layer + ')', timeout);
	}
	jsmenu['active'][layer] = menuobj;
	
}

function setMenuPosition(showid, offset) 
{
	var showobj = $(showid);
	var menuobj = $(showid + '_menu');
	if(isUndefined(offset)) 
	{
	   offset = 0;
	}
	if(showobj) 
	{
		showobj.pos = fetchOffset(showobj);
		showobj.X = showobj.pos['left'];
		showobj.Y = showobj.pos['top'];
		showobj.w = showobj.offsetWidth;
		showobj.h = showobj.offsetHeight;
		menuobj.w = menuobj.offsetWidth;
		menuobj.h = menuobj.offsetHeight;
		menuobj.style.left = (showobj.X + menuobj.w > document.body.clientWidth) && (showobj.X + showobj.w - menuobj.w >= 0) ? showobj.X + showobj.w - menuobj.w + 'px' : showobj.X + 'px';
		menuobj.style.top = offset == 1 ? showobj.Y + 'px' : (offset == 2 || ((showobj.Y + showobj.h + menuobj.h > document.documentElement.scrollTop + document.documentElement.clientHeight) && (showobj.Y - menuobj.h >= 0)) ? (showobj.Y - menuobj.h) + 'px' : showobj.Y + showobj.h + 'px');
		if(menuobj.style.clip && !is_opera) 
		{
			menuobj.style.clip = 'rect(auto, auto, auto, auto)';
		}
	}
}

function hideMenu(layer) 
{
	if(isUndefined(layer)) 
	{
	   layer = 0;
	}
	if(jsmenu['active'][layer]) 
	{
		try 
		{
			$(jsmenu['active'][layer].ctrlkey).className = ctrlobjclassName;
		} 
		catch(e) 
		{
		
		}
		clearTimeout(jsmenu['timer'][jsmenu['active'][layer].ctrlkey]);
		jsmenu['active'][layer].style.display = 'none';
		if(is_ie && is_ie < 7 && jsmenu['iframe'][layer]) 
		{
			jsmenu['iframe'][layer].style.display = 'none';
		}
		jsmenu['active'][layer] = null;
	}
}

function fetchOffset(obj) 
{
	var left_offset = obj.offsetLeft;
    var top_offset = obj.offsetTop;
	while((obj = obj.offsetParent) != null) 
	{
	    left_offset += obj.offsetLeft;
		top_offset += obj.offsetTop;
	}
    return { 'left' : left_offset, 'top' : top_offset };
}

function ebygum(eventobj) 
{
	if(!eventobj || is_ie) 
	{
		window.event.cancelBubble = true;
		return window.event;
	} 
	else 
	{
		if(eventobj.target.type == 'submit') 
		{
			eventobj.target.form.submit();
		}
		eventobj.stopPropagation();
		return eventobj;
	}
}

function menuoption_onclick_function(e) 
{
	this.clickfunc();
	hideMenu();
}

function menuoption_onclick_link(e) 
{
	choose(e, this);
}

function menuoption_onmouseover(e) 
{
	this.className = 'popupmenu_highlight';
}

function menuoption_onmouseout(e) 
{
	this.className = 'popupmenu_option';
}

function choose(e, obj) 
{
	var links = obj.getElementsByTagName('a');
	if(links[0]) 
	{
		if(is_ie) 
		{
			links[0].click();
			window.event.cancelBubble = true;
		} 
		else 
		{
			if(e.shiftKey) 
			{
				window.open(links[0].href);
				e.stopPropagation();
				e.preventDefault();
			} 
			else
			{
				window.location = links[0].href;
				e.stopPropagation();
				e.preventDefault();
			}
		}
		hideMenu();
	}
}