function ToggleList(param1)
            {

               if(document.getElementById){  

                     var oSpanListItems = document.getElementById(param1);            
   
                     if((oSpanListItems.style.display == "none") || (oSpanListItems.style.display == "")){

                        oSpanListItems.style.display = "block";
                        document.getElementById("img_" + param1).innerHTML = '<img src="/pic/minus.gif" width="9" height="9" border=0>';
                     }
                     else{

                        oSpanListItems.style.display = "none";
                        document.getElementById("img_" + param1).innerHTML = '<img  src="/pic/plus.gif" width="9" height="9" border=0>';
                     }
               }

               else{
                  return;
               }
               
            return;
            }