function showClassList1()
        {
            
            if(document.getElementById("class_cnt1").style.display == "none")
            {
                document.getElementById("class_cnt1").style.display="block"; 
            }
            else
            {
                document.getElementById("class_cnt1").style.display="none"; 
            }
        }
function hiddenList1()
		{ 
			document.getElementById("class_cnt1").style.display="none";
		}
		



function showClassList2()
        {
            
            if(document.getElementById("class_cnt2").style.display == "none")
            {
                document.getElementById("class_cnt2").style.display="block"; 
            }
            else
            {
                document.getElementById("class_cnt2").style.display="none"; 
            }
        }
function hiddenList2()
		{ 
			document.getElementById("class_cnt2").style.display="none";
		}