function Swapper(identifier, showPrefix, hidePrefix, showClass, hideClass){    
    ClassSwap(showPrefix+identifier, showClass, hideClass);
    ClassSwap(hidePrefix+identifier, showClass, hideClass );        
}    

function ClassSwap(elementId, class1, class2){
    var obj = document.getElementById(elementId);

    if(obj.className.indexOf(class1) > -1)
    {
        obj.className = obj.className.replace(class1, class2);       
    } 
    else{
        obj.className = obj.className.replace(class2, class1);
    }
   
    
}