function toggleTab(num) { var listEl = document.getElementById("most_popular").getElementsByTagName("li"); var boxMostViewed = document.getElementById("most_viewed"); var boxMostEmailed = document.getElementById("most_emailed"); if (!document.getElementById("tips_of_the_day")) { var boxTips = null } else { var boxTips = document.getElementById("tips_of_the_day") } for (var i = 0; i < listEl.length; i++) { if (i == num) { listEl[i].className += listEl[i].className ? ' here' : ' here' } else { listEl[i].className = '' } } if (num == 0) { boxMostViewed.className += boxMostViewed.className ? ' here' : ' here'; boxMostEmailed.className = ''; if (boxTips != null) { boxTips.className = '' } } else if (num == 1) { boxMostEmailed.className += boxMostEmailed.className ? ' here' : ' here'; boxMostViewed.className = ''; if (boxTips != null) { boxTips.className = '' } } else if (num == 2) { boxTips.className += boxTips.className ? ' here' : ' here'; boxMostViewed.className = ''; boxMostEmailed.className = '' } }