//-----------------------------------------------------------------------
// this program show and hide box 
//-----------------------------------------------------------------------

// configutation
// 

function showBlock(idName){
         if(document.getElementById) {//NN6,Mozilla,IE5?
            document.getElementById(idName).style.display = "block";;
         }
         else if(document.all) {      //IE4?
            document.all(idName).style.display = "block";;
         }
         else if(document.layers) {   //NN4?
            document.layers[idName].display = "block";;
         }
      }
      
      function hideBlock(idName){
         if(document.getElementById) {//NN6,Mozilla,IE5?
            document.getElementById(idName).style.display = "none";;
         }
         else if(document.all) {      //IE4?
            document.all(idName).style.display = "none";;
         }
         else if(document.layers) {   //NN4?
            document.layers[idName].display = "none";;
         }
      } 
 
      var opened_blocks = new Array;
      function switchBlock(id) {
         if (opened_blocks[id]) {
            opened_blocks[id] = false;
            hideBlock(id);
         } else {
            opened_blocks[id] = true;
            showBlock(id);
         }
     }