resize.js

这是《JavaScript学习源代码》一书的源代码

// specify the LOAD even-handler
window.onload=set_pos;

// specify the RESIZE event-handler
window.onresize=set_pos;

// a function to react to the RESIZE event
function set_pos()
{
  var width = document.body.clientWidth;

  var left_pos = parseInt((width / 2) -50);

  // set the left position of the <div> element
  document.getElementById("lyr").style.left=(left_pos+"px");
}