禁止右键+禁止选择文本JS代码分享（兼容主流浏览器）

//右键开始
if (window.Event)
document.captureEvents(Event.MOUSEUP);
function nocontextmenu() {
event.cancelBubble = true
event.returnValue = false;
return false;
}
function norightclick(e) {
if (window.Event) {
if (e.which == 2 || e.which == 3)
return false;
}
else
if (event.button == 2 || event.button == 3) {
event.cancelBubble = true
event.returnValue = false;
return false;
}

}
document.oncontextmenu = nocontextmenu;  // for IE5+
document.onmousedown = norightclick;  // for all others

//禁止选择文本
var omitformtags = ["input", "textarea", "select"]
omitformtags = omitformtags.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
}