js 经常使用方法收藏

1.禁止右键菜单

document.oncontextmenu = function (event){
 if(window.event){
  event = window.event;
 }try{
  var the = event.srcElement;
  if (!((the.tagName == "INPUT" && the.type.toLowerCase() == "text") || the.tagName == "TEXTAREA")){
   return false;
  }
  return true;
 }catch (e){
  return false;
 }
}

 

2.动态获取窗口大小window.onresize出发。

<script type="text/javascript">
function findDimensions(){
$("#imgDIv").width($("#layout").width()).height($("#layout").height()).attr("src","img/backimg.jpg");
}
             //调用函数，获取数值
$(function(){findDimensions();});
window.onresize=findDimensions;
</script>