JavaScript实现当网页加载完成后执行指定函数的方法

<script type="text/javascript" >
  window.onload = MyCoolInitFunc
</script>

function addLoadEvent(func) {
  var oldonload = window.onload;
  if (typeof window.onload != 'function') {
    window.onload = func;
  }
  else {
    window.onload = function() {
      oldonload();
      func();
    }
  }
}