javascript禁止页面滚动，但是ie8及以下不支持

var scrollFunc=function(e){
e=e||window.event;
if (e&&e.preventDefault){ 
e.preventDefault();
e.stopPropagation();
}else{ 
e.returnvalue=false; 
return false; 
}
}
if(window.addEventListener){
window.addEventListener('DOMMouseScroll',scrollFunc,false);
window.addEventListener('mousewheel',scrollFunc,false);
}
else{
window.onmousewheel=scrollFunc;
}