function KeyPress(e){
                                
        if(window.event) {// IE
                keynum = e.keyCode;
                ctrl = e.ctrlKey || e.metaKey;
        }
        else if(e.which) { // Netscape/Firefox/Opera
                keynum = e.which;
                ctrl = e.ctrlKey || e.metaKey;
        }
        else {
            // unknown browser
                return true;
        }
      
   
        var mask = /[cC]/;

        keychar = String.fromCharCode(keynum);
        if (mask.test(keychar) && ctrl) {
            alert('nu-nu no-no');
        } 

}