popup-layers.js

这是《JavaScript学习源代码》一书的源代码

// a function to toggle visibility on
function toggle(str, n)
{
  // a variable to store the object
  var obj;
  
  // get the appropriate div layer by id
  obj = document.getElementById(str);
  
  // set the layer's visibility status
  obj.style.visibility = (n == 1) ? "visible" :  "hidden";
}