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Menu - rozbalovací (s pomocí JavaScriptu)
Normální položka
Zobrazeno: 11940

Popis: Rozbalovací menu s pomocí JavaScriptu.
Funkčnost: Internet Explorer
Hodnocení: **
Zaslal: Rypi - rypi@atlas.cz
Ukázka
<!-- TWO STEPS TO INSTALL CASCADING MENU:

  1.  Copy the coding into the HEAD of your HTML document
  2.  Add the last code 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 -->

<!-- This script and many more are available free online at -->
<!-- The JavaScript Source!! http://javascript.internet.com -->

<!-- Begin
var isDOM = false, isNS4 = false;
if (document.all) var isDOM = true, docObj = 'document.all.', styObj = '.style';
else if (document.layers) var isNS4 = true, docObj = 'document.', styObj = '';
// Hide timeout
var popTimer = 0;
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) {
targetName = menu[targetNum][0].id;
menuName = menu[menuNum][0].id;
menuRef = eval(docObj + menuName + styObj);
thisX = parseInt(menuRef.left);
thisY = parseInt(menuRef.top);
// Add onto this the position of the trigger item within the menu
itemPath = docObj;
if (isNS4) itemPath += menuName + '.document.';
itemRef = eval(itemPath + menuName + itemNum.toString() + styObj);
thisX += parseInt(itemRef.left);
thisY += parseInt(itemRef.top);
// Add those to the target's offset to set the target's position, show it.
with (eval(docObj + targetName + styObj)) {
left = parseInt(thisX + menu[targetNum][0].x);
top = parseInt(thisY + menu[targetNum][0].y);
visibility = 'visible';
      }
   }
}
function popOut(menuNum, itemNum) {
// Hide menu in 1/2 sec, *UNLESS* another mouseover clears the timeout!
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 (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]) {
thisMenu = menu[menuCount][0].id;
thisItem = thisMenu + changeArray[menuCount].toString();
newCol = isOver ? menu[menuCount][0].overCol : menu[menuCount][0].backCol;
if (isDOM) document.all[thisItem].style.backgroundColor = newCol;
if (isNS4) document[thisMenu].document[thisItem].bgColor = newCol;
      }
   }
}
function hideAllBut(menuNum) {
var keepMenus = getTree(menuNum, 1);
for (count = 0; count < menu.length; count++)
if (!keepMenus[count])
eval(docObj + menu[count][0].id + styObj + '.visibility = "hidden"');
changeCol(litNow, false);
}
// *** MENU CONSTRUCTION FUNCTIONS ***
// Variable to end a div or layer based on browser.
var endDL = isDOM ? '</div>' : '</layer>';
function Menu(id, x, y, width, overCol, backCol, borderCol) {
this.id = id;
this.x = x;
this.y = y;
this.width = width;
// Colours of menu and items.
this.overCol = overCol;
this.backCol = backCol;
this.borderCol = borderCol;
// Parent menu and item numbers, indexed later.
this.parentMenu = null;
this.parentItem = null;
}
function Item(text, href, height, target) {
this.text = text;
this.href = href;
this.height = height;
this.target = target;
}
function startDL(id, x, y, width, height, vis, back, border, zIndex, extraProps) {
// Write a div in IE that resembles a layer's settings, or a layer in NS.
if (isDOM) {
str = '<div id="' + id + '" style="position: absolute; left: ' + x + '; top: ' + y +
 '; width: ' + width + '; height: ' + height + '; visibility: ' + vis + '; ';
if (back) str += 'background: ' + back + '; ';
if (border) str += 'padding: 3px; border: 1px solid ' + border + '; ';
if (zIndex) str += 'z-index: ' + zIndex + '; ';
// End style declaration.
str += '" ';
}
if (isNS4) {
str = '<layer id="' + id + '" left="' + x + '" top="' + y + '" width="' + width +
 '" height="' + height + '" visibility="' + vis + '" ';
if (back) str += 'bgcolor="' + back + '" ';
if (border) str += 'style="border: 1px solid ' + border + '" ';
if (zIndex) str += 'z-index="' + zIndex + '" ';
}
return str + extraProps + '>';
}
function mouseProps(currMenu, currItem) {
return 'onMouseOver="popOver(' + currMenu + ',' + currItem + ')" onMouseOut="popOut(' + currMenu + ',' + currItem + ')"';
}
function writeMenus(customRoot, popInd) {
for (currMenu = 0; currMenu < menu.length; currMenu++) {
showMenu = true;
if ((currMenu == 0) && customRoot) {
document.write(customRoot);
showMenu = false;
}
with (menu[currMenu][0]) {
// Start generating a div with position offset - no dimensions, colours, mouseovers.
// This position is only relevant for root menu anyway as all others are altered later.
menuHTML = startDL(id, x, y, 0, 0, 'hidden', null, null, 100, '');
// Width is less padding (3 left & right) and border (1 left & right).
var back = backCol, bord = borderCol, currWidth = width - 8;
}
// Y-position of next item, increase if you want a menu header.
itemPos = 0;
// Remember, items start from 1 in the array (0 is menu object itself, above).
for (currItem = 1; currItem < menu[currMenu].length; currItem++) {
// Auto-generate ID's in numerical sequence.
trigID = menu[currMenu][0].id + currItem.toString();
// Now, work with properties of individual menu items.
with (menu[currMenu][currItem]) {
// Start a menu item positioned vertically, with mouse events and colours.
menuHTML += startDL(trigID, 0, itemPos, 0, 0, 'inherit', back, bord, 100, mouseProps(currMenu, currItem)) + '<table width="' + currWidth + '" border="0" cellspacing="0" cellpadding="0"><tr>' + '<td align="left"><a class="Item" href="' + href + '">' + text + '</a></td>' + '<td class="Item" align="right">' + (target ? popInd : '') + '</td></tr></table>' + endDL;
if (target > 0) {
// Set target's parents to this and offset it by the current position.
menu[target][0].parentMenu = currMenu;
menu[target][0].parentItem = currItem;
}
// Move next item position down by this item's height.
itemPos += height;
   }
}
// Write this menu to the document.
if (showMenu) document.write(menuHTML + endDL);
litNow[currMenu] = null;
   }
}
//  End -->
</script>
<style>
<!--
.Item { text-decoration: none; color: #FFFFFF; font: 12px Arial, Helvetica }
-->
</style>
</HEAD>

<!-- STEP TWO: Copy this code into the BODY of your HTML document  -->

<BODY>

<SCRIPT LANGUAGE="JavaScript">
<!-- Original:  Angus Turnbull -->
<!-- Web Site:  http://gusnz.cjb.net -->

<!-- This script and many more are available free online at -->
<!-- The JavaScript Source!! http://javascript.internet.com -->

<!-- Begin
/* Syntaxes:
 *
 * menu[menuNumber][0] = new Menu('menu ID', left, top, width, 'mouseover colour',
 *'background colour', 'border colour');
 * Left and Top are measured on-the-fly relative to the top-left corner of its trigger.
 *
 * menu[menuNumber][itemNumber] = new Item('Text', 'URL', vertical spacing to next item, 
 *target menu number);
 * If no target menu (popout) is desired, set it to 0. All menus must trace back their
 * targets to the root menu! That is, every menu must be targeted by one item somewhere.
 * Even if you're not writing the root menu, you must still specify its settings here.
 */
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).
var defOver = '#336699', defBack = '#003366', defBorder = '#000000';
// Default height of menu items - the spacing to the next item, actually.
var defHeight = 22;
// Menu 0 is the special, 'root' menu from which everything else arises.
menu[0] = new Array();
// Pass a few different colours, as an example.
menu[0][0] = new Menu('rootMenu', 0, 0, 80, '#669999', '#006666', defBorder);
// Notice how the targets are all set to nonzero values...
menu[0][1] = new Item('File', '#', defHeight, 1);
menu[0][2] = new Item('Edit', '#', defHeight, 2);
menu[0][3] = new Item('Help', '#', defHeight, 3);
menu[1] = new Array();
// The File menu is positioned 0px across and 22 down from its trigger, and is 80 wide.
menu[1][0] = new Menu('fileMenu', 0, 22, 80, defOver, defBack, defBorder);
menu[1][1] = new Item('Open', '#', defHeight, 0);
menu[1][2] = new Item('Save', '#', defHeight, 0);
// Non-zero target means this will trigger a popup.
menu[1][3] = new Item('Reopen', '#', defHeight, 4);
menu[1][4] = new Item('Exit', '#', defHeight, 0);
menu[2] = new Array();
menu[2][0] = new Menu('editMenu', 0, 22, 80, defOver, defBack, defBorder);
menu[2][1] = new Item('Cut', '#', defHeight, 0);
menu[2][2] = new Item('Copy', '#', defHeight, 0);
menu[2][3] = new Item('Paste', '#', defHeight, 0);
menu[3] = new Array();
menu[3][0] = new Menu('helpMenu', 0, 22, 80, defOver, defBack, defBorder);
menu[3][1] = new Item('Contents', '#', defHeight, 0);
menu[3][2] = new Item('Index', '#', defHeight, 0);
menu[3][3] = new Item('About', '#', defHeight, 5);
menu[4] = new Array();
// This is across but not down... a horizontal popout (with crazy colours :)...
menu[4][0] = new Menu('reopenMenu', 85, 0, 100, '#333366', '#666699', '#663399');
menu[4][1] = new Item('Recent Doc 1:<br>Schedule', '#', 36, 0);
menu[4][2] = new Item('Recent Doc 2:<br>Plan', '#', 40, 0);
menu[4][3] = new Item('Etc. etc...', '#', defHeight, 0);
menu[5] = new Array();
// Leftwards popout with a negative x relative to its trigger.
menu[5][0] = new Menu('aboutMenu', -85, -15, 80, defOver, defBack, defBorder);
menu[5][1] = new Item('Leftwards!<br>And up!', '#', 30, 0);
// Now, this next bit of script will write our own custom root menu -- a horizontal
// one, as the defaults are all vertical with borders. Even if you are writing your
// own root menu, you must still specify the names, colours and targets above -- the
// positions are calculated on the fly and hence are ignored.
// Basically, you must duplicate the output of the writeMenus() function. Just work
// from this example.
// Syntax: startDL('id', x, y, width, height, 'visibility', '#background colour or null
//for transparent', '#border colour or null for no border', 'additional properties');
// It returns a string of HTML text comprising the opening tag of a div or layer.
// mouseProps(menu, item) returns the 'onMouseEvent' properties for a specific menu item,
// passed as 'additional properties' to startDL. Just cut and paste below, or allow the
// script to write its own root menu.
// endDL is a variable containing either '</div>' or '</layer>', so add it afterwards.
newRoot = startDL('rootMenu', 0, 0, '100%', 17, 'hidden', '#006666', null, 100, '');
newRoot += startDL('rootMenu1', 5, 0, 40, 17, 'inherit', '#006666', null, 100, mouseProps(0, 1));
newRoot += '<span class="Item">  File</span>' + endDL;
newRoot += startDL('rootMenu2', 55, 0, 40, 17, 'inherit', '#006666', null, 100, mouseProps(0, 2));
newRoot += '<span class="Item">  Edit</span>' + endDL;
newRoot += startDL('rootMenu3', 105, 0, 40, 17, 'inherit', '#006666', null, 100, mouseProps(0, 3));
newRoot += '<span class="Item">  Help</span>' + endDL;
newRoot += endDL;
// Pass this two strings - the first is HTML to write a custom root menu, or null to
// generate one normally. The second is the popout indicator HTML - try an image...?
// Try writeMenus(null, '<img src="...">'); in your own script.
writeMenus(newRoot, '>');
// 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);
}
// Show root menu command - place in an onLoad="..." type function if you want.
eval(docObj + menu[0][0].id + styObj + '.visibility = "visible"');
// This is just the moving command for the example.
function moveRoot() {
rM = eval(docObj + menu[0][0].id + styObj);
if (parseInt(rM.top) < 40) rM.top = 40;
else rM.top = 0;
}
//  End -->
</script>

<p> <p>

<!-- Script Size:  12.56 KB -->