function HideDivCourse_about(){document.getElementById("divcourse_about").style.visibility="hidden"}function ClearTimeCourse_about(){document.getElementById("divcourse_about").style.visibility="visible";clearTimeout(clearCourse)}function HideCourse_about(){document.getElementById("divcourse_about").style.visibility="hidden"}function ShowCourse_about(){document.getElementById("divcourse_about").style.visibility="visible"}function HideDivCourse_attraction(){document.getElementById("divcourse_attraction").style.visibility="hidden"}function ClearTimeCourse_attraction(){document.getElementById("divcourse_attraction").style.visibility="visible";clearTimeout(clearCourse)}function HideCourse_attraction(){document.getElementById("divcourse_attraction").style.visibility="hidden"}function ShowCourse_attraction(){document.getElementById("divcourse_attraction").style.visibility="visible"}function HideDivCourse(){document.getElementById("divcourse").style.visibility="hidden"}function ClearTimeCourse(){document.getElementById("divcourse").style.visibility="visible";clearTimeout(clearCourse)}function HideCourse(){document.getElementById("divcourse").style.visibility="hidden"}function ShowCourse(){document.getElementById("divcourse").style.visibility="visible"}var clearCourse