//STARTUP SCRIPT           
     var div1;
     var div2;
     var div3;  
     var div4;
        
    function init()
    {
       div1 = document.getElementById('Div1'); 
       div2 = document.getElementById('Div2');  
       div3 = document.getElementById('Div3');      
       div4 = document.getElementById('Div4');      
    }                   
    
    function whatOn()
    {
        div1.style.display = "block";
    } 
    function howOn()
    { 
        div2.style.display = "block";
    }  
    function whoOn()
    {   
        div3.style.display = "block";
    }  
    function registrationOn()
    {
        div4.style.display = "block";
    }
                  
    function infoOff()
    {                   
        div1.style.display = "none";
        div2.style.display = "none";
        div3.style.display = "none";
        div4.style.display = "none";
    }