禁止复制 + 锁右键 + 禁止全选(兼容IE Chrome等)

function iEsc() { return false; }
function iRec() { return true; }
function DisableKeys() {
if (event.ctrlKey || event.shiftKey || event.altKey) {
window.event.returnValue = false;
iEsc();
}
}
document.ondragstart = iEsc;
document.onkeydown = DisableKeys;
document.oncontextmenu = iEsc;
if (typeof document.onselectstart != "undefined")
document.onselectstart = iEsc;
else {
document.onmousedown = iEsc;
document.onmouseup = iRec;
}
function DisableRightClick(qsyzDOTnet) {
if (window.Event) {
if (qsyzDOTnet.which == 2 || qsyzDOTnet.which == 3)
iEsc();
}
else
if (event.button == 2 || event.button == 3) {
event.cancelBubble = true
event.returnValue = false;
iEsc();
}
}