// JavaScript Document

function Show(element_id) {
  
    var el1 = document.getElementById(element_id);  
    
    if (el1.style.display=='block')
      el1.style.display = 'none';
    else
      el1.style.display = 'block';

  }

  function Hide(element_id) {
  
    var el1 = document.getElementById(element_id);

    
    el1.style.display = 'none';
  }