function changeTab(a){document.getElementById("marathon_content").style.display="none";document.getElementById("scheduled_content").style.display="none";document.getElementById("sit_and_go_content").style.display="none";if(a=="marathon"){document.getElementById("marathon_content").style.display="block";document.getElementById("marathon_button_disabled").style.display="block";document.getElementById("scheduled_button_disabled").style.display="none";document.getElementById("sit_and_go_button_disabled").style.display="none";document.getElementById("marathon_button_active").style.display="none";document.getElementById("scheduled_button_active").style.display="block";document.getElementById("sit_and_go_button_active").style.display="block"}else{if(a=="scheduled"){document.getElementById("scheduled_content").style.display="block";document.getElementById("marathon_button_disabled").style.display="none";document.getElementById("scheduled_button_disabled").style.display="block";document.getElementById("sit_and_go_button_disabled").style.display="none";document.getElementById("marathon_button_active").style.display="block";document.getElementById("scheduled_button_active").style.display="none";document.getElementById("sit_and_go_button_active").style.display="block"}else{if(a=="sitandgo"){document.getElementById("sit_and_go_content").style.display="block";document.getElementById("marathon_button_disabled").style.display="none";document.getElementById("scheduled_button_disabled").style.display="none";document.getElementById("sit_and_go_button_disabled").style.display="block";document.getElementById("marathon_button_active").style.display="block";document.getElementById("scheduled_button_active").style.display="block";document.getElementById("sit_and_go_button_active").style.display="none"}}}};