Open datepicker on condition

I want my datepicker to open only under condition, in this case the presence of a class, here's the not working code:

$('.ui-datepicker-trigger').click(function(e){
    if ($(this).hasClass('disableDatepicker')) {
        e.preventDefault();
    }
});

Thanks!

Solution

This should be work

$("input").datepicker({ 
         beforeShow: function(a,b){ 
             if ($(this).hasClass('disableDatepicker')) return false;  
         } 
});