/**
*
*  Unselectable text
*  http://www.webtoolkit.info/
*
**/

var Unselectable = {

    enable : function(e) {
        var e = e ? e : window.event;

        if (e.button != 1) {
            if (e.target) {
                var targer = e.target;
            } else if (e.srcElement) {
                var targer = e.srcElement;
            }

            var targetTag = targer.tagName.toLowerCase();
            if ((targetTag != "input") && (targetTag != "textarea")) {
                return false;
            }
        }
    },

    disable : function () {
        return true;
    }

}

if (typeof(document.onselectstart) != "undefined") {
    document.onselectstart = Unselectable.enable;
} else {
    document.onmousedown = Unselectable.enable;
    document.onmouseup = Unselectable.disable;
}
<!-- 
var message="Sorry, right-click has been disabled"; 
/////////////////////////////////// 
function clickIE() {if (document.all) {return false;}} 
function clickNS(e) {if 
(document.layers||(document.getElementById&&!document.all)) { 
if (e.which==2||e.which==3) {return false;}}} 
if (document.layers) 
{document.captureEvents(Event.MOUSEDOWN);document.onmousedown=clickNS;} 
else{document.onmouseup=clickNS;document.oncontextmenu=clickIE;} 
document.oncontextmenu=new Function("return false") 
// --> 

function CC_noErrors() {
return true;
}

window.onerror = CC_noErrors;