initEvent();

function initEvent() {
    if (navigator.appName.indexOf("Internet Explorer") != -1)
        document.onmousedown = noSourceExplorer;

    if (navigator.appName.indexOf("Netscape") != -1)
        document.onmousedown = noSourceExplorer;
}
function noSourceExplorer() {
    if (event.button == 2 || event.button == 3) {
        alert("禁止複製內容!!");
    }
}