JS实用技巧小结(屏蔽错误、div滚动条设置、背景图片位置等)

<script type="text/javascript">
window.onerror = function(){
   alert("出现脚本错误");
   return true;
}
alert(b);
</script>

style="overflow-x: hidden; overflow-y: auto;"

function init(){
  //document.getElementById("ac").style.display = "none";与下面的等价
  document.getElementById("ac").style["display"] = "none";
}
window.onload = init;

#wrapper{
  position:relative;
  background:url(../res/main_bg.png) no-repeat;
  background-position: 0% 5%;
  _background-image:none;
  display:none;
}