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Posted By

indianocean on 11/20/07


Tagged

javascript crossbrowser


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vali29


Highlight menu on hover with delay and display submenu

Published in: JavaScript 

  • Adjustable delay until menu appears to prevent accidental activation
  • Snipped out of production sources, needs some generalization.
  • http://alexle.net/archives/169
  • http://www.klevo.sk/javascript/javascripts-settimeout-and-how-to-use-it-with-your-methods/
  • http://www.tomanthony.co.uk/demo/delayedCSSmenu/
Plain TextExpand 
  1. // attach events to all menu items
  2. function addHooks() 
  3.   {
  4.   var menuLinks = document.getElementById('head_nav1').getElementsByTagName('a');
  5.  
  6.   for(var i = 0; i < menuLinks.length; i++) 
  7.     {
  8.     addEvent(menuLinks[i], "mouseover", activateMenuWithDelay);
  9.     addEvent(menuLinks[i], "mouseout", deactivateMenu);
  10.     }
  11.   }
  12.  
  13. // helper for addHooks(), needed for different browser behaviour
  14. function addEvent (elm, type, fnc) 
  15.   {
  16. 	if (window.addEventListener) 
  17. 	  {
  18. 		elm.addEventListener(type, fnc, false);
  19. 	  }
  20. 	// IE
  21. 	else 
  22. 	  {
  23. 		elm.attachEvent("on" + type, fnc);
  24. 	  }
  25.   }
  26.  
  27. function activateMenuWithDelay()
  28.   {
  29.   var oThis = this;
  30.   var ident;
  31.  
  32.   // IE & Opera
  33.   if (window.event) 
  34.     { 
  35.     srcElm = window.event.srcElement;
  36.     ident = srcElm.attributes["ident"].value;
  37.     oThis = srcElm;
  38.     } 
  39.   // W3C DOM (FF, Mozilla, Safari)
  40.   else 
  41.     { 
  42.     ident = this.attributes["ident"].value;
  43.     }
  44.  
  45.   if(oThis.timer)
  46.     {
  47.     clearTimeout(oThis.timer);            
  48.     }
  49.   oThis.timer = setTimeout(function() { displaySubMenu.apply(oThis, [ident,oThis]); }, 130);
  50.   }
  51.  
  52. function deactivateMenu()
  53. {
  54.   var oThis = this;
  55.  
  56.   // IE & Opera
  57.   if (window.event) 
  58.   { 
  59.     oThis = window.event.srcElement;
  60.   } 
  61.  
  62.   if(oThis.timer)
  63.   {
  64.     clearTimeout(oThis.timer);
  65.   }
  66. }

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