// description of your code here

function simpletogglediv(whichLayer)
{
         var theElementStyle = document.getElementById(whichLayer); 

        if(theElementStyle.style.display == "block")
        { 
                theElementStyle.style.display = "none";  
                 
        }
        else
        { 
                theElementStyle.style.display = "block"; 
        }
}