jscookmenu.js

商城改进板全站代码

// default node properties
var _cmNodeProperties =
{
	// theme prefix
	prefix:	'',

  	// main menu display attributes
  	//
  	// Note.  When the menu bar is horizontal,
  	// mainFolderLeft and mainFolderRight are
  	// put in <span></span>.  When the menu
  	// bar is vertical, they would be put in
  	// a separate TD cell.

  	// HTML code to the left of the folder item
  	mainFolderLeft: '',
  	// HTML code to the right of the folder item
  	mainFolderRight: '',
	// HTML code to the left of the regular item
	mainItemLeft: '',
	// HTML code to the right of the regular item
	mainItemRight:	'',

	// sub menu display attributes

	// HTML code to the left of the folder item
	folderLeft:		'',
	// HTML code to the right of the folder item
	folderRight:	'',
	// HTML code to the left of the regular item
	itemLeft:		'',
	// HTML code to the right of the regular item
	itemRight:		'',
	// cell spacing for main menu
	mainSpacing:	0,
	// cell spacing for sub menus
	subSpacing:		0,

	// optional settings
	// If not set, use the default

	// auto disappear time for submenus in milli-seconds
	delay:			500,

	// 1st layer sub menu starting index
	zIndexStart:	1000,
	// z-index incremental step for subsequent layers
	zIndexInc:		5,

	// sub menu header appears before the sub menu table
	subMenuHeader:	null,
	// sub menu header appears after the sub menu table
	subMenuFooter:	null,

	// submenu location adjustments
	//
	// offsetHMainAdjust for adjusting the first submenu
	// 		of a 'hbr' menu.
	// offsetVMainAdjust for adjusting the first submenu
	//		of a 'vbr' menu.
	// offsetSubAdjust for subsequent level of submenus
	//
	offsetHMainAdjust:	[0, 0],
	offsetVMainAdjust:	[0, 0],
	offsetSubAdjust:	[0, 0],

	// act on click to open sub menu
	// not yet implemented
	// 0 : use default behavior
	// 1 : hover open in all cases
	// 2 : click on main, hover on sub
	// 3 : click open in all cases (illegal as of 1.5)
	clickOpen:		1,

	// special effects on open/closing a sub menu
	effect:			null
};

// Globals
var _cmIDCount = 0;
var _cmIDName = 'cmSubMenuID';		// for creating submenu id

var _cmTimeOut = null;				// how long the menu would stay
var _cmCurrentItem = null;			// the current menu item being selected;

var _cmNoAction = new Object ();	// indicate that the item cannot be hovered.
var _cmNoClick = new Object ();		// similar to _cmNoAction but does not respond to mouseup/mousedown events
var _cmSplit = new Object ();		// indicate that the item is a menu split

var _cmMenuList = new Array ();		// a list of the current menus
var _cmItemList = new Array ();		// a simple list of items

var _cmFrameList = new Array ();	// a pool of reusable iframes
var _cmFrameListSize = 0;			// keep track of the actual size
var _cmFrameIDCount = 0;			// keep track of the frame id
var _cmFrameMasking = true;			// use the frame masking

// disable iframe masking for IE7
/*@cc_on
	@if (@_jscript_version >= 5.6)
		if (_cmFrameMasking)
		{
			var v = navigator.appVersion;
			var i = v.indexOf ("MSIE ");
			if (i >= 0)
			{
				if (parseInt (navigator.appVersion.substring (i + 5)) >= 7)
					_cmFrameMasking = false;
			}
		}
	@end
@*/

var _cmClicked = false;				// for onClick

// flag for turning on off hiding objects
//
// 0: automatic
// 1: hiding
// 2: no hiding
var _cmHideObjects = 0;

// Utility function to do a shallow copy a node property
function cmClone (nodeProperties)
{
	var returnVal = new Object ();
	for (v in nodeProperties)
		returnVal[v] = nodeProperties[v];
	return returnVal;
}

//
// store the new menu information into a structure to retrieve it later
//
function cmAllocMenu (id, menu, orient, nodeProperties, prefix)
{
	var info = new Object ();
	info.div = id;
	info.menu = menu;
	info.orient = orient;
	info.nodeProperties = nodeProperties;
	info.prefix = prefix;
	var menuID = _cmMenuList.length;
	_cmMenuList[menuID] = info;
	return menuID;
}

//
// request a frame
//
function cmAllocFrame ()
{
	if (_cmFrameListSize > 0)
		return cmGetObject (_cmFrameList[--_cmFrameListSize]);
	var frameObj = document.createElement ('iframe');
	var id = _cmFrameIDCount++;
	frameObj.id = 'cmFrame' + id;
	frameObj.frameBorder = '0';
	frameObj.style.display = 'none';
	frameObj.src = 'javascript:false';
	document.body.appendChild (frameObj);
	frameObj.style.filter = 'alpha(opacity=0)';
	frameObj.style.zIndex = 99;
	frameObj.style.position = 'absolute';
	frameObj.style.border = '0';
	frameObj.scrolling = 'no';
	return frameObj;
}

//
// make a frame resuable later
//
function cmFreeFrame (frameObj)
{
	_cmFrameList[_cmFrameListSize++] = frameObj.id;
}

//////////////////////////////////////////////////////////////////////
//
// Drawing Functions and Utility Functions
//
//////////////////////////////////////////////////////////////////////

//
// produce a new unique id
//
function cmNewID ()
{
	return _cmIDName + (++_cmIDCount);
}

//
// return the property string for the menu item
//
function cmActionItem (item, isMain, idSub, menuInfo, menuID)
{
	_cmItemList[_cmItemList.length] = item;
	var index = _cmItemList.length - 1;
	idSub = (!idSub) ? 'null' : ('\'' + idSub + '\'');

	var clickOpen = menuInfo.nodeProperties.clickOpen;
	var onClick = (clickOpen == 3) || (clickOpen == 2 && isMain);

	var param = 'this,' + isMain + ',' + idSub + ',' + menuID + ',' + index;

	var returnStr;
	if (onClick)
		returnStr = ' onmouseover="cmItemMouseOver(' + param + ',false)" onmousedown="cmItemMouseDownOpenSub (' + param + ')"';
	else
		returnStr = ' onmouseover="cmItemMouseOverOpenSub (' + param + ')" onmousedown="cmItemMouseDown (' + param + ')"';
	return returnStr + ' onmouseout="cmItemMouseOut (' + param + ')" onmouseup="cmItemMouseUp (' + param + ')"';
}

//
// this one is used by _cmNoClick to only take care of onmouseover and onmouseout
// events which are associated with menu but not actions associated with menu clicking/closing
//
function cmNoClickItem (item, isMain, idSub, menuInfo, menuID)
{
	// var index = _cmItemList.push (item) - 1;
	_cmItemList[_cmItemList.length] = item;
	var index = _cmItemList.length - 1;
	idSub = (!idSub) ? 'null' : ('\'' + idSub + '\'');

	var param = 'this,' + isMain + ',' + idSub + ',' + menuID + ',' + index;

	return ' onmouseover="cmItemMouseOver (' + param + ')" onmouseout="cmItemMouseOut (' + param + ')"';
}

function cmNoActionItem (item)
{
	return item[1];
}

function cmSplitItem (prefix, isMain, vertical)
{
	var classStr = 'cm' + prefix;
	if (isMain)
	{
		classStr += 'Main';
		if (vertical)
			classStr += 'HSplit';
		else
			classStr += 'VSplit';
	}
	else
		classStr += 'HSplit';
	return eval (classStr);
}


//
// draw the sub menu recursively
//
function cmDrawSubMenu (subMenu, prefix, id, nodeProperties, zIndexStart, menuInfo, menuID)
{
	var str = '<div class="' + prefix + 'SubMenu" id="' + id + '" style="z-index: ' + zIndexStart + ';position: absolute; top: 0px; left: 0px;">';
	if (nodeProperties.subMenuHeader)
		str += nodeProperties.subMenuHeader;

	str += '<table summary="sub menu" id="' + id + 'Table" cellspacing="' + nodeProperties.subSpacing + '" class="' + prefix + 'SubMenuTable">';

	var strSub = '';

	var item;
	var idSub;
	var hasChild;

	var i;

	var classStr;

	for (i = 5; i < subMenu.length; ++i)
	{
		item = subMenu[i];
		if (!item)
			continue;

		if (item == _cmSplit)
			item = cmSplitItem (prefix, 0, true);
		item.parentItem = subMenu;
		item.subMenuID = id;
		
		hasChild = (item.length > 5);
		idSub = hasChild ? cmNewID () : null;

		str += '<tr class="' + prefix + 'MenuItem"';
		if (item[0] != _cmNoClick)
			str += cmActionItem (item, 0, idSub, menuInfo, menuID);
		else
			str += cmNoClickItem (item, 0, idSub, menuInfo, menuID);
		str += '>'

		if (item[0] == _cmNoAction || item[0] == _cmNoClick)
		{
			str += cmNoActionItem (item);
			str += '</tr>';
			continue;
		}

		classStr = prefix + 'Menu';
		classStr += hasChild ? 'Folder' : 'Item';

		str += '<td class="' + classStr + 'Left">';

		if (item[0] != null)
			str += item[0];
		else
			str += hasChild ? nodeProperties.folderLeft : nodeProperties.itemLeft;

		str += '</td><td class="' + classStr + 'Text">' + item[1];

		str += '</td><td class="' + classStr + 'Right">';

		if (hasChild)
		{
			str += nodeProperties.folderRight;
			strSub += cmDrawSubMenu (item, prefix, idSub, nodeProperties, zIndexStart + nodeProperties.zIndexInc, menuInfo, menuID);
		}
		else
			str += nodeProperties.itemRight;
		str += '</td></tr>';
	}

	str += '</table>';

	if (nodeProperties.subMenuFooter)
		str += nodeProperties.subMenuFooter;
	str += '</div>' + strSub;
	return str;
}

//
// The function that builds the menu inside the specified element id.
//
// id				id of the element
// orient			orientation of the menu in [hv][ub][lr] format
// menu				the menu object to be drawn
// nodeProperties	properties for the theme
// prefix			prefix of the theme
//
function cmDraw (id, menu, orient, nodeProperties, prefix)
{
	var obj = cmGetObject (id);

	if (!prefix)
		prefix = nodeProperties.prefix;
	if (!prefix)
		prefix = '';
	if (!nodeProperties)
		nodeProperties = _cmNodeProperties;
	if (!orient)
		orient = 'hbr';

	var menuID = cmAllocMenu (id, menu, orient, nodeProperties, prefix);
	var menuInfo = _cmMenuList[menuID];

	// setup potentially missing properties
	if (!nodeProperties.delay)
		nodeProperties.delay = _cmNodeProperties.delay;
	if (!nodeProperties.clickOpen)
		nodeProperties.clickOpen = _cmNodeProperties.clickOpen;
	if (!nodeProperties.zIndexStart)
		nodeProperties.zIndexStart = _cmNodeProperties.zIndexStart;
	if (!nodeProperties.zIndexInc)
		nodeProperties.zIndexInc = _cmNodeProperties.zIndexInc;
	if (!nodeProperties.offsetHMainAdjust)
		nodeProperties.offsetHMainAdjust = _cmNodeProperties.offsetHMainAdjust;
	if (!nodeProperties.offsetVMainAdjust)
		nodeProperties.offsetVMainAdjust = _cmNodeProperties.offsetVMainAdjust;
	if (!nodeProperties.offsetSubAdjust)
		nodeProperties.offsetSubAdjust = _cmNodeProperties.offsetSubAdjust;
	// save user setting on frame masking
	menuInfo.cmFrameMasking = _cmFrameMasking;

	var str = '<table summary="main menu" class="' + prefix + 'Menu" cellspacing="' + nodeProperties.mainSpacing + '">';
	var strSub = '';

	var vertical;

	// draw the main menu items
	if (orient.charAt (0) == 'h')
	{
		str += '<tr>';
		vertical = false;
	}
	else
	{
		vertical = true;
	}

	var i;
	var item;
	var idSub;
	var hasChild;

	var classStr;

	for (i = 0; i < menu.length; ++i)
	{
		item = menu[i];

		if (!item)
			continue;

		item.menu = menu;
		item.subMenuID = id;

		str += vertical ? '<tr' : '<td';
		str += ' class="' + prefix + 'MainItem"';

		hasChild = (item.length > 5);
		idSub = hasChild ? cmNewID () : null;

		str += cmActionItem (item, 1, idSub, menuInfo, menuID) + '>';

		if (item == _cmSplit)
			item = cmSplitItem (prefix, 1, vertical);

		if (item[0] == _cmNoAction || item[0] == _cmNoClick)
		{
			str += cmNoActionItem (item);
			str += vertical? '</tr>' : '</td>';
			continue;
		}

		classStr = prefix + 'Main' + (hasChild ? 'Folder' : 'Item');

		str += vertical ? '<td' : '<span';
		str += ' class="' + classStr + 'Left">';

		str += (item[0] == null) ? (hasChild ? nodeProperties.mainFolderLeft : nodeProperties.mainItemLeft)
					 : item[0];
		str += vertical ? '</td>' : '</span>';

		str += vertical ? '<td' : '<span';
		str += ' class="' + classStr + 'Text">';
		str += item[1];

		str += vertical ? '</td>' : '</span>';

		str += vertical ? '<td' : '<span';
		str += ' class="' + classStr + 'Right">';

		str += hasChild ? nodeProperties.mainFolderRight : nodeProperties.mainItemRight;

		str += vertical ? '</td>' : '</span>';

		str += vertical ? '</tr>' : '</td>';

		if (hasChild)
		    {
		    strSub += cmDrawSubMenu (item, prefix, idSub, nodeProperties, nodeProperties.zIndexStart, menuInfo, menuID);
	        }
	}
	if (!vertical)
		str += '</tr>';
	str += '</table>' + strSub;
	obj.innerHTML = str;
}

//
// The function builds the menu inside the specified element id.
//
// This function is similar to cmDraw except that menu is taken from HTML node
// rather a javascript tree.  This feature allows links to be scanned by search
// bots.
//
// This function basically converts HTML node to a javascript tree, and then calls
// cmDraw to draw the actual menu, replacing the hidden menu tree.
//
// Format:
//	<div id="menu">
//		<ul style="visibility: hidden">
//			<li><span>icon</span><a href="link" title="description">main menu text</a>
//				<ul>
//					<li><span>icon</span><a href="link" title="description">submenu item</a>
//					</li>
//				</ul>
//			</li>
//		</ul>
//	</div>
//
function cmDrawFromText (id, orient, nodeProperties, prefix)
{
	var domMenu = cmGetObject (id);
	var menu = null;
	for (var currentDomItem = domMenu.firstChild; currentDomItem; currentDomItem = currentDomItem.nextSibling)
	{
		if (!currentDomItem.tagName)
			continue;
		var tag = currentDomItem.tagName.toLowerCase ();
		if (tag != 'ul' && tag != 'ol')
			continue;
		menu = cmDrawFromTextSubMenu (currentDomItem);
		break;
	}
	if (menu)
		cmDraw (id, menu, orient, nodeProperties, prefix);
}

//
// a recursive function that build menu tree structure
//
function cmDrawFromTextSubMenu (domMenu)
{
	var items = new Array ();
	for (var currentDomItem = domMenu.firstChild; currentDomItem; currentDomItem = currentDomItem.nextSibling)
	{
		if (!currentDomItem.tagName || currentDomItem.tagName.toLowerCase () != 'li')
			continue;
		if (currentDomItem.firstChild == null)
		{