// JavaScript Document

function dsp(loc){
   	  if(document.getElementById){
      var foc=loc.firstChild;
      foc=loc.firstChild.innerHTML?
      loc.firstChild:
      loc.firstChild.nextSibling;
      foc.innerHTML=foc.innerHTML=='+'?'-':'+';
      foc=loc.parentNode.nextSibling.style?
      loc.parentNode.nextSibling:
      loc.parentNode.nextSibling.nextSibling;
      foc.style.display=foc.style.display=='block'?'none':'block';}}