var clearCourse; function ShowCourse() { document.getElementById("divcourse").style.visibility = "visible" } function HideCourse() { document.getElementById("divcourse").style.visibility = "hidden" } function ClearTimeCourse() { document.getElementById("divcourse").style.visibility = "visible"; clearTimeout(clearCourse) } function HideDivCourse() { document.getElementById("divcourse").style.visibility = "hidden" };