마우스휠이벤트 등록 및 활용

//마우스휠이벤트 등록
if(window.attachEvent) {
    window.attachEvent("onmousewheel" ,function(event){moveSheet(event);});
}
else if(window.addEventListener) {
    if(nBrowserCheck == "Firefox")
        window.addEventListener("DOMMouseScroll", function(event){moveSheet(event);}, false);
    else
        window.addEventListener("mousewheel", function(event){moveSheet(event);}, false);
}



//활용
if(evt.detail) {
    WData = evt.detail;
   
    if (WData <= -3) {
        Arrow = "up";
    }
    else if (WData >= 3) {
        Arrow = "down";
    }
}
else {
    WData = evt.wheelDelta;

    if (WData >= 120) {
        Arrow = "up";
    }
    else if (WData <= -120) {
        Arrow = "down";
    }
}