Disable ctrl + p keys to prevent

Disable ctrl + p keys to prevent

Reference: http://forums.asp.net/post/4012820.aspx

function disableCtrlKeyCombination(e)
{
        //list all CTRL + key combinations you want to disable
    var forbiddenkeys = new Array('a', 'n', 'c', 'x', 'v', 'j', 'p');
        var key;
        var isCtrl;
        if(window.event)
        {
                key = window.event.keyCode;     //IE
                if(window.event.ctrlKey)
                        isCtrl = true;
                else
                        isCtrl = false;
        }
        else
        {
                key = e.which;     //firefox
                if(e.ctrlKey)
                        isCtrl = true;
                else
                        isCtrl = false;
        }


        //if ctrl is pressed check if other key is in forbidenKeys array
        if(isCtrl)
        {
                for(i=0; i<forbiddenkeys.length; i++)
                {
                        //case-insensitive comparation
                    if (forbiddenkeys[i].toLowerCase() == String.fromCharCode(key).toLowerCase())
                        {
                                alert("Key combination CTRL + "
                                        +String.fromCharCode(key)
                                        +" has been disabled.");
                                return false;
                        }
                }
        }
        return true;
    }
    var oEventUtil = new Object();
    oEventUtil.AddEventHandler = function (oTarget, sEventType, fnHandler) {
        if (oTarget.addEventListener) {
            oTarget.addEventListener(sEventType, fnHandler, false);
        } else if (oTarget.attachEvent) {
            oTarget.attachEvent('on' + sEventType, fnHandler);
        } else {
            oTarget['on' + sEventType] = fnHandler;
        }
    }
    var oTB = function () {
        document.getElementById("TextBox1").focus();
    }

onkeypress="return disableCtrlKeyCombination(event);" onkeydown="return disableCtrlKeyCombination(event);" >