var ctrlKey = false;
$(document).bind('keydown',function(event){
if(event.keyCode == 17) {
ctrlKey = true;
}
if (ctrlKey & event.keyCode == 73) {
alert('ctrl+i');
}
});
$(document).bind('keyup',function(event){
if(event.keyCode == 17) {
ctrlKey = false;
}
});