wheel mouse paging

/* wheel mouse paging */
var w=document.createElement("div");document.body.insertAdjacentElement("afterBegin",w);w.style.width="290px";w.style.height="50px";w.style.backgroundColor="whitesmoke";
w.onmousewheel=function(e){console.log(e.wheelDelta);e.wheelDelta<0?page++:page--;location.href="?q="+tag+"&p="+page;;return false;}