禁止浏览器缩放

<script language="JavaSript">

document.onmousewheel = function (evt) { 

     var e = evt || window.event;

     if(e.preventDefault && e.ctrlKey) e.preventDefault(); 

     if(e.ctrlKey) e.returnValue = false; }; 

     if (window.addEventListener) 

        window.addEventListener('DOMMouseScroll', document.onmousewheel, false);

</script>