MediaWiki:Common.js/DropDownList.js

function ddm {	// Variables, change these in case you need to set other class names (mmhide_ for 	// contribute users for example) var parentClass='isParent';     //gets applied when the LI has a nested UL	var activeParentClass='isActive';        //gets applied when the nested UL is visible var preventHoverClass='nohover';        //denotes a navigation that should not get any hover effects var indicateJSClass='dhtml';    //gets applied to the main navigation when Javascript is available var toHideClass='hiddenChild';  //gets applied to hide the nested UL	var toShowClass='shownChild';    //gets applied to show the nested UL	var currentClass='current';      //denotes the current active sub element and prevents collapsing var d=document.getElementById('nav');  //denotes the navigation element

// if DOM is not available stop right here. if(!document.getElementById && !document.createTextNode){return;}

// if the navigation element is available, apply the class denoting DHTML capabilities if(d) {		d.className+=d.className==''?indicateJSClass:' '+indicateJSClass; var lis,i,firstUL,j,apply;

// loop through all LIs and check which ones have a nested UL		lis = d.getElementsByTagName('li'); for(i=0;i<lis.length;i++) {			firstUL = lis[i].getElementsByTagName('ul')[0] // if there is a nested UL, deactivate the first nested link and apply the class to show // there is a nested list if(firstUL) {				lis[i].childNodes[0].onclick=function{return false;} lis[i].className+=lis[i].className==''?parentClass:' '+parentClass; // check if there is a "current" element apply = true; if(new RegExp('\\b'+currentClass+'\\b').test(lis[i].className)){apply=false;} if(apply) {					for(j=0;j<firstUL.getElementsByTagName('li').length;j++) {						if(new RegExp('\\b'+currentClass+'\\b').test(firstUL.getElementsByTagName('li')[j].className)) {apply=false;break;} }				}				// if there is no current element, apply the class to hide the nested list if(apply) {					firstUL.className+=firstUL.className==''?toHideClass:' '+toHideClass; // check if there is a class to prevent hover effects and only apply the function // onclick if that is the case, otherwise apply it onclick and onhover if(new RegExp('\\b'+preventHoverClass+'\\b').test(d.className)) {						lis[i].onclick=function{doddm(this);} } 					else { lis[i].onclick=function{doddm(this);} lis[i].onmouseover=function{doddm(this);} lis[i].onmouseout=function{doddm(null);} }					// if there is a current element, define the list as being kept open and apply the // classes to show the nested list and define the parent LI as an active one }				else { lis[i].keepopen=1; firstUL.className+=firstUL.className==''?toShowClass:' '+toShowClass; lis[i].className=lis[i].className.replace(parentClass,activeParentClass); }			}		}	}	// function to show and hide the nested lists and add the classes to the parent LIs function doddm(o) {		var childUL,isobj,swap;

// loop through all LIs of the navigation lis=d.getElementsByTagName('li'); for(i=0;i<lis.length;i++) {			isobj=lis[i]==o; // function to exchange class names in an object swap=function(tmpobj,tmporg,tmprep) {			tmpobj.className=tmpobj.className.replace(tmporg,t mprep) }			// if the current LI does not have an indicator to be kept visible if(!lis[i].keepopen) {				childUL=lis[i].getElementsByTagName('ul')[0]; // check if there is a nested UL and if the current LI is not the one clicked on // and exchange the classes accordingly (ie. hide all other nested lists and 				// make the LIs parent rather than active.				if(childUL)    				{       					if(new RegExp('\\b'+preventHoverClass+'\\b').test(d.class Name))					{						if(new RegExp('\\b'+activeParentClass+'\\b').test(lis[i].className))						{							swap(childUL,isobj?toShowClass:toHideClass,isobj?t oHideClass:toShowClass);     							swap(lis[i],isobj?activeParentClass:parentClass,isobj?parentC lass:activeParentClass);  						} 						else {							swap(childUL,isobj?toHideClass:toShowClass,isobj?t oShowClass:toHideClass);     							swap(lis[i],isobj?parentClass:activeParentClass,isobj?activeP arentClass:parentClass);  						}					} 					else {						swap(childUL,isobj?toHideClass:toShowClass,isobj?t oShowClass:toHideClass);     						swap(lis[i],isobj?parentClass:activeParentClass,isobj?activeP arentClass:parentClass); }				} 			}		}	} }

window.onload=function {	ddm; // add other functions to be called onload below }