JavaScript:Example:DisableRightMouseButton

const omitformtags = ["input", "textarea", "select"].join("|");

function disableselect(e) {
    if (omitformtags.indexOf(e.target.tagName.toLowerCase())==-1) {
        return false
    }
}

function reEnable(){
    return true
}

if (typeof document.onselectstart!="undefined") {
    document.onselectstart = new Function ("return false");
} else {
    document.onmousedown = disableselect;
    document.onmouseup = reEnable;
}

window.oncontextmenu = null;
document.oncontextmenu = null;

for(var id = 0; id < document.getElementsByTagName("*").length; ++id) { elements[id].oncontextmenu = null; }