This is better and correct way:
$(document).ready(function() {
var ctrl = false;
$(document).keydown(function(e){
// disable ctrl + +/-
if(ctrl && (e.keyCode == 107 || e.keyCode == 109)) {
alert('Zoom is disabled!');
return false;
}
if(e.keyCode == 17) {
ctrl = true;
// disable ctrl + scroll
$(document).bind('scroll', function() {
if(ctrl) {
alert('Zoom is disabled!');
return false;
}
});
}
})
$(document).keyup(function(e) {
if(e.keyCode == 17) {
ctrl = false;
$(document).unbind('scroll');
}
});
});