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7.3

How do I extend the functionality of the attached script to collapse one submenus when a new one is expanded

Asked by Christie_M in MS SQL Server, JavaScript

I'm struggling to adapt the java script code below so that when you click to open one sub menu, all other submenus close. i.e. there can only be one sub menu open at any one time.

Next challenge:  I need to make one of the submenus start expanded depending upon the page URL. i.e. for all pages in category 1 (e.g. /category-1/submenu-a.html)  the category 1 sub menu should be displayed by default when the page loads.

Hope you can help. 
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------------------CSS--------------------
.menu,
.menu ul {
	margin:0;
	padding:0;
	list-style:none;
}
.menu {width:200px;}
.menu li {
	margin:0;
	padding:0;
	margin-bottom:1px;
}
.menu a {
	display:block;
	padding:2px 5px;
	color:#000;
	background:#b0c23d;
	text-decoration:none;
}
.menu a:hover {background:#d9dcb0;}
.menu ul li {padding-left:15px;}
.menu ul a {background:#ced174;}
.hidden {display:none;}
 
------------------HTML-------------------
<ul class="mc_menu">
    <li><a href="#">Category 1</a>
        <ul>
        <li><a href="#">Submenu 1a</a></li>
        <li><a href="#">Submenu 1b</a></li>
    </ul>
    </li>
    <li><a href="#">Category 2</a>
        <ul>
        <li><a href="#">Submenu 2a</a></li>
        <li><a href="#">Submenu 2b</a></li>
        </ul>
    </li>
    <li><a href="#">Category 3</a>
    </li>
</ul>
 
 
 
<ul class="menu">
    <li><a href="#">Category 1</a>
        <ul>
        <li><a href="#">Submenu 1a</a></li>
        <li><a href="#">Submenu 1b</a></li>
    </ul>
    </li>
    <li><a href="#">Category 2</a>
        <ul>
        <li><a href="#">Submenu 2a</a></li>
        <li><a href="#">Submenu 2b</a></li>
        </ul>
    </li>
    <li><a href="#">Category 3</a>
    </li>
</ul>
------------------JAVA SCRIPT--------------------
 
var toggleMenu = {
	init : function(sContainerClass, sHiddenClass) {
		if (!document.getElementById || !document.createTextNode) {return;} // Check for DOM support
		var arrMenus = this.getElementsByClassName(document, 'ul', sContainerClass);
		var arrSubMenus, oSubMenu, oLink;
		for (var i = 0; i < arrMenus.length; i++) {
			arrSubMenus = arrMenus[i].getElementsByTagName('ul');
			for (var j = 0; j < arrSubMenus.length; j++) {
				oSubMenu = arrSubMenus[j];
				oLink = oSubMenu.parentNode.getElementsByTagName('a')[0];
				oLink.onclick = function(){toggleMenu.toggle(this.parentNode.getElementsByTagName('ul')[0], sHiddenClass); return false;}
				this.toggle(oSubMenu, sHiddenClass);
			}
		}
	},
	toggle : function(el, sHiddenClass) {
		var oRegExp = new RegExp("(^|\\s)" + sHiddenClass + "(\\s|$)");
		el.className = (oRegExp.test(el.className)) ? el.className.replace(oRegExp, '') : el.className + ' ' + sHiddenClass; // Add or remove the class name that hides the element
	},
 
	addEvent : function(obj, type, fn) {
		if (obj.addEventListener)
			obj.addEventListener(type, fn, false);
		else if (obj.attachEvent) {
			obj["e"+type+fn] = fn;
			obj[type+fn] = function() {obj["e"+type+fn](window.event);}
			obj.attachEvent("on"+type, obj[type+fn]);
		}
	},
/*
 
*/
	getElementsByClassName : function(oElm, strTagName, strClassName){
	    var arrElements = (strTagName == "*" && document.all)? document.all : oElm.getElementsByTagName(strTagName);
	    var arrReturnElements = new Array();
	    strClassName = strClassName.replace(/\-/g, "\\-");
	    var oRegExp = new RegExp("(^|\\s)" + strClassName + "(\\s|$)");
	    var oElement;
	    for(var i=0; i<arrElements.length; i++){
	        oElement = arrElements[i];      
	        if(oRegExp.test(oElement.className)){
	            arrReturnElements.push(oElement);
	        }   
	    }
	    return (arrReturnElements)
	}
};
toggleMenu.addEvent(window, 'load', function(){toggleMenu.init('menu','hidden');});
[+][-]10/22/09 12:38 AM, ID: 25631582Accepted Solution

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About this solution

Zones: MS SQL Server, JavaScript
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Solution Provided By: mplungjan
Participating Experts: 1
Solution Grade: A
 
[+][-]11/06/09 07:09 AM, ID: 25759724Expert Comment

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