function toggleDiv(txt, image){
         var content = document.getElementById(txt);
         var pic = document.getElementById(image);            
         if(content.className == 'divHide'){
            content.className = 'divShow';
            pic.src ='http://www.colson.ca/images/neg.gif';
            pic.alt ='neg';
            }
         else{
            content.className = 'divHide';
            pic.src ='http://www.colson.ca/images/pos.gif';
            pic.alt='pos';
            }
         };