<!-- THREE STEPS TO INSTALL CASCADING MENU: 1. Copy the coding into the HEAD of your HTML document 2. Add the onLoad event handler into the BODY tag 3. Put the last coding into the BODY of your HTML document --> <!-- STEP ONE: Paste this code into the HEAD of your HTML document --> <HEAD> <SCRIPT LANGUAGE="JavaScript"> <!-- Original: Angus Turnbull --> <!-- Web Site: http://gusnz.cjb.net --> <!-- Begin var isDOM = (document.getElementById ? true : false); var isIE4 = ((document.all && !isDOM) ? true : false); var isNS4 = (document.layers ? true : false); function getRef(id) { if (isDOM) return document.getElementById(id); if (isIE4) return document.all[id]; if (isNS4) return document.layers[id]; } function getSty(id) { return (isNS4 ? getRef(id) : getRef(id).style); } // Hide timeout. var popTimer = 0; // Array showing highlighted menu items. var litNow = new Array(); function popOver(menuNum, itemNum) { clearTimeout(popTimer); hideAllBut(menuNum); litNow = getTree(menuNum, itemNum); changeCol(litNow, true); targetNum = menu[menuNum][itemNum].target; if (targetNum > 0) { thisX = parseInt(menu[menuNum][0].ref.left) + parseInt(menu[menuNum][itemNum].ref.left); thisY = parseInt(menu[menuNum][0].ref.top) + parseInt(menu[menuNum][itemNum].ref.top); with (menu[targetNum][0].ref) { left = parseInt(thisX + menu[targetNum][0].x); top = parseInt(thisY + menu[targetNum][0].y); visibility = 'visible'; } } } function popOut(menuNum, itemNum) { if ((menuNum == 0) && !menu[menuNum][itemNum].target) hideAllBut(0) else popTimer = setTimeout('hideAllBut(0)', 500); } function getTree(menuNum, itemNum) { // Array index is the menu number. The contents are null (if that menu is not a parent) // or the item number in that menu that is an ancestor (to light it up). itemArray = new Array(menu.length); while(1) { itemArray[menuNum] = itemNum; // If we've reached the top of the hierarchy, return. if (menuNum == 0) return itemArray; itemNum = menu[menuNum][0].parentItem; menuNum = menu[menuNum][0].parentMenu; } } // Pass an array and a boolean to specify colour change, true = over colour. function changeCol(changeArray, isOver) { for (menuCount = 0; menuCount < changeArray.length; menuCount++) { if (changeArray[menuCount]) { newCol = isOver ? menu[menuCount][0].overCol : menu[menuCount][0].backCol; // Change the colours of the div/layer background. with (menu[menuCount][changeArray[menuCount]].ref) { if (isNS4) bgColor = newCol; else backgroundColor = newCol; } } } } function hideAllBut(menuNum) { var keepMenus = getTree(menuNum, 1); for (count = 0; count < menu.length; count++) if (!keepMenus[count]) menu[count][0].ref.visibility = 'hidden'; changeCol(litNow, false); } // *** MENU CONSTRUCTION FUNCTIONS *** function Menu(isVert, popInd, x, y, width, overCol, backCol, borderClass, textClass) { // True or false - a vertical menu? this.isVert = isVert; // The popout indicator used (if any) for this menu. this.popInd = popInd // Position and size settings. this.x = x; this.y = y; this.width = width; // Colours of menu and items. this.overCol = overCol; this.backCol = backCol; // The stylesheet class used for item borders and the text within items. this.borderClass = borderClass; this.textClass = textClass; // Parent menu and item numbers, indexed later. this.parentMenu = null; this.parentItem = null; // Reference to the object's style properties (set later). this.ref = null; } function Item(text, href, frame, length, spacing, target) { this.text = text; this.href = href; this.frame = frame; this.length = length; this.spacing = spacing; this.target = target; // Reference to the object's style properties (set later). this.ref = null; } function writeMenus() { if (!isDOM && !isIE4 && !isNS4) return; for (currMenu = 0; currMenu < menu.length; currMenu++) with (menu[currMenu][0]) { // Variable for holding HTML for items and positions of next item. var str = '', itemX = 0, itemY = 0; // Remember, items start from 1 in the array (0 is menu object itself, above). // Also use properties of each item nested in the other with() for construction. for (currItem = 1; currItem < menu[currMenu].length; currItem++) with (menu[currMenu][currItem]) { var itemID = 'menu' + currMenu + 'item' + currItem; // The width and height of the menu item - dependent on orientation! var w = (isVert ? width : length); var h = (isVert ? length : width); // Create a div or layer text string with appropriate styles/properties. // Thanks to Paul Maden (www.paulmaden.com) for helping debug this in IE4, apparently // the width must be a miniumum of 3 for it to work in that browser. if (isDOM || isIE4) { str += '<div id="' + itemID + '" style="position: absolute; left: ' + itemX + '; top: ' + itemY + '; width: ' + w + '; height: ' + h + '; visibility: inherit; '; if (backCol) str += 'background: ' + backCol + '; '; str += '" '; } if (isNS4) { str += '<layer id="' + itemID + '" left="' + itemX + '" top="' + itemY + '" width="' + w + '" height="' + h + '" visibility="inherit" '; if (backCol) str += 'bgcolor="' + backCol + '" '; } if (borderClass) str += 'class="' + borderClass + '" '; // Add mouseover handlers and finish div/layer. str += 'onMouseOver="popOver(' + currMenu + ',' + currItem + ')" onMouseOut="popOut(' + currMenu + ',' + currItem + ')">'; // Add contents of item (default: table with link inside). // In IE/NS6+, add padding if there's a border to emulate NS4's layer padding. // If a target frame is specified, also add that to the <a> tag. str += '<table width="' + (w - 8) + '" border="0" cellspacing="0" cellpadding="' + (!isNS4 && borderClass ? 3 : 0) + '"><tr><td align="left" height="' + (h - 7) + '">' + '<a class="' + textClass + '" href="' + href + '"' + (frame ? ' target="' + frame + '">' : '>') + text + '</a></td>'; if (target > 0) { // Set target's parents to this menu item. menu[target][0].parentMenu = currMenu; menu[target][0].parentItem = currItem; // Add a popout indicator. if (popInd) str += '<td class="' + textClass + '" align="right">' + popInd + '</td>'; } str += '</tr></table>' + (isNS4 ? '</layer>' : '</div>'); if (isVert) itemY += length + spacing; else itemX += length + spacing; } if (isDOM) { var newDiv = document.createElement('div'); document.getElementsByTagName('body').item(0).appendChild(newDiv); newDiv.innerHTML = str; ref = newDiv.style; ref.position = 'absolute'; ref.visibility = 'hidden'; } // Insert a div tag to the end of the BODY with menu HTML in place for IE4. if (isIE4) { document.body.insertAdjacentHTML('beforeEnd', '<div id="menu' + currMenu + 'div" ' + 'style="position: absolute; visibility: hidden">' + str + '</div>'); ref = getSty('menu' + currMenu + 'div'); } // In NS4, create a reference to a new layer and write the items to it. if (isNS4) { ref = new Layer(0); ref.document.write(str); ref.document.close(); } for (currItem = 1; currItem < menu[currMenu].length; currItem++) { itemName = 'menu' + currMenu + 'item' + currItem; if (isDOM || isIE4) menu[currMenu][currItem].ref = getSty(itemName); if (isNS4) menu[currMenu][currItem].ref = ref.document[itemName]; } } with(menu[0][0]) { ref.left = x; ref.top = y; ref.visibility = 'visible'; } } // Syntaxes: *** START EDITING HERE, READ THIS SECTION CAREFULLY! *** // // menu[menuNumber][0] = new Menu(Vertical menu? (true/false), 'popout indicator', left, top, // width, 'mouseover colour', 'background colour', 'border stylesheet', 'text stylesheet'); // // Left and Top are measured on-the-fly relative to the top-left corner of its trigger, or // for the root menu, the top-left corner of the page. // // menu[menuNumber][itemNumber] = new Item('Text', 'URL', 'target frame', length of menu item, // additional spacing to next menu item, number of target menu to popout); // // If no target menu (popout) is desired, set it to 0. Likewise, if your site does not use // frames, pass an empty string as a frame target. // // Something that needs explaining - the Vertical Menu setup. You can see most menus below // are 'true', that is they are vertical, except for the first root menu. The 'length' and // 'width' of an item depends on its orientation -- length is how long the item runs for in // the direction of the menu, and width is the lateral dimension of the menu. Just look at // the examples and tweak the numbers, they'll make sense eventually :). var menu = new Array(); // Default colours passed to most menu constructors (just passed to functions, not // a global variable - makes things easier to change later in bulk). var defOver = '#336699', defBack = '#003366'; // Default 'length' of menu items - item height if menu is vertical, width if horizontal. var defLength = 22; // Menu 0 is the special, 'root' menu from which everything else arises. menu[0] = new Array(); // A non-vertical menu with a few different colours and no popout indicator, as an example. // *** MOVE ROOT MENU AROUND HERE *** it's positioned at (5, 0) and is 17px high now. menu[0][0] = new Menu(false, '', 5, 0, 17, '#669999', '#006666', '', 'itemText'); // Notice how the targets are all set to nonzero values... // The 'length' of each of these items is 40, and there is spacing of 10 to the next item. // Most of the links are set to '#' hashes, make sure you change them to actual files. menu[0][1] = new Item(' File', '#', '', 40, 10, 1); menu[0][2] = new Item(' Edit', '#', '', 40, 10, 2); menu[0][3] = new Item(' Help', '#', '', 40, 10, 3); // An example of a link with a target frame/window as well... menu[0][4] = new Item(' Site', 'http://gusnz.cjb.net', '_new', 40, 10, 0); // File menu. menu[1] = new Array(); // The File menu is positioned 0px across and 22 down from its trigger, and is 80 wide. // All text in this menu has the stylesheet class 'item' -- see the <style> section above. // We've passed a 'greater-than' sign '>' as a popout indicator. Try an image...? menu[1][0] = new Menu(true, '>', 0, 22, 80, defOver, defBack, 'itemBorder', 'itemText'); menu[1][1] = new Item('Open', '#', '', defLength, 0, 0); menu[1][2] = new Item('Save', '#', '', defLength, 0, 0); // Non-zero target means this will trigger a popout -- menu[4] which is the 'Reopen' menu. menu[1][3] = new Item('Reopen', '#', '', defLength, 0, 4); menu[1][4] = new Item('Exit', '#', '', defLength, 0, 0); // Edit menu. menu[2] = new Array(); menu[2][0] = new Menu(true, '>', 0, 22, 80, defOver, defBack, 'itemBorder', 'itemText'); menu[2][1] = new Item('Cut', '#', '', defLength, 0, 0); menu[2][2] = new Item('Copy', '#', '', defLength, 0, 0); menu[2][3] = new Item('Paste', '#', '', defLength, 0, 0); // Help menu menu[3] = new Array(); menu[3][0] = new Menu(true, '<', 0, 22, 80, defOver, defBack, 'itemBorder', 'itemText'); menu[3][1] = new Item('Contents', '#', '', defLength, 0, 0); menu[3][2] = new Item('Index', '#', '', defLength, 0, 0); menu[3][3] = new Item('About', '#', '', defLength, 0, 5); // Reopen menu menu[4] = new Array(); // This is across but not down... a horizontal popout (with crazy stylesheets :)... menu[4][0] = new Menu(true, '>', 85, 0, 120, '#333366', '#666699', 'crazyBorder', 'crazyText'); // These items are lengthier than normal, and have extra spacing due to the fancy borders. menu[4][1] = new Item('Recent Doc 1:<br>Schedule', '#', '', 36, 4, 0); menu[4][2] = new Item('Recent Doc 2:<br>Plan', '#', '', 36, 7, 0); menu[4][3] = new Item('Etc. etc...', '#', '', defLength, 0, 0); // Help About popout menu[5] = new Array(); // Leftwards popout with a negative x and y relative to its trigger. menu[5][0] = new Menu(true, '>', -85, -17, 80, defOver, defBack, 'itemBorder', 'itemText'); menu[5][1] = new Item('Leftwards!<br>And up!', '#', '', 40, 0, 0); // *** OPTIONAL CODE FROM HERE DOWN *** // These two lines handle the window resize bug in NS4. See <body onResize="...">. // I recommend you leave this here as otherwise when you resize NS4's width menus are hidden. var popOldWidth = window.innerWidth; nsResizeHandler = new Function('if (popOldWidth != window.innerWidth) location.reload()'); // This is a quick snippet that captures all clicks on the document and hides the menus // every time you click. Use if you want. if (isNS4) document.captureEvents(Event.CLICK); document.onclick = clickHandle; function clickHandle(evt) { if (isNS4) document.routeEvent(evt); hideAllBut(0); } // This is just the moving command for the example. function moveRoot() { with(menu[0][0].ref) left = ((parseInt(left) < 100) ? 100 : 5); } // End --> </script> <!-- *** IMPORTANT STYLESHEET SECTION - Change the border classes and text colours *** --> <style> <!-- .itemBorder { border: 1px solid black } .itemText { text-decoration: none; color: #FFFFFF; font: 12px Arial, Helvetica } .crazyBorder { border: 2px outset #663399 } .crazyText { text-decoration: none; color: #FFCC99; font: Bold 12px Arial, Helvetica } --> </style> </HEAD> <!-- STEP TWO: Insert the onLoad event handler into your BODY tag --> <!-- STEP THREE: Copy this code into the BODY of your HTML document --> <!-- It's important that you position the menu over a background, like a table/image --> <table bgcolor="#006666" width="100%" border="0" cellpadding="0" cellspacing="0"> <tr><td height="17"><font size="1"> </font></td></tr></table>
