工作中，总是要处理一些前端的小功能。都是网上搜的JS脚本
<script>
//防止页面后退
history.pushState(null, null, document.URL);
window.addEventListener('popstate', function () {
history.pushState(null, null, document.URL);
});
</script>
判断是否微信浏览器，相应显示与隐藏html元素
<script type="text/javascript">
function is_weixn(){
var ua = navigator.userAgent.toLowerCase();
if(ua.match(/MicroMessenger/i)!="micromessenger") {
var box=document.getElementById("notify"); //div or span
var box2=document.getElementById("submit"); //<input id="submit" type="submit" value="提 交">
box.style.display="inline";
box2.style.display="none";
} else {
return false;
}
}
</script>
<body onload="is_weixn()">
定时滚动的文本框：
<script type="text/javascript">
function startmarquee(lh,speed,delay,index){
var t;
var p=false;
var o=document.getElementById("marqueebox"+index);
o.innerHTML+=o.innerHTML;
o.onmouseover=function(){p=true}
o.onmouseout=function(){p=false}
o.scrollTop = 0;
function start(){
t=setInterval(scrolling,speed);
if(!p){ o.scrollTop += 1;}
}
function scrolling(){
if(o.scrollTop%lh!=0){
o.scrollTop += 1;
if(o.scrollTop>=o.scrollHeight/2) o.scrollTop = 0;
}else{
clearInterval(t);
setTimeout(start,delay);
}
}
setTimeout(start,delay);
}
startmarquee(72,20,5000,0);
</script>
<!-- html 部分-->
<div class="box" id="marqueebox0">
<div id="safetxt">...</div>
<div id="safetxt2">...</div>
</div>