锁右键：
<script language="javascript">
function curdate()
{
var today=new date();
yearstr=1900+today.getyear();
monthstr=today.getmonth()+1;
datestr=today.getdate();
weekval=today.getday();
msg="每日综述（"+yearstr+"年"+monthstr+"月"+
""+datestr+"日）"
return msg;
}

function click() {
if (event.button==2) {
alert("中国黄沙果园信息网！欢迎您的到来！")
}
}
document.onmousedown=click

</script>
解开右键：先按左健不动,按下右健,放开左健,放开右健,就可以看到原来的菜单，用shift＋f10也可以