timedropdown.js

var defaultTime = new Date(Date.now() + 3600 * 1000);
var hours = []; 
for (var i = 0; i < 24; i++)
{   
    hours.push({
        value : ("0" + i).slice(-2), 
        selected : (defaultTime.getHours() == i)
    }); 
}   

var minutes = []; 
for (var i = 0; i < 60; i += 5)
{   
    minutes.push({
        value : ("0" + i).slice(-2), 
        selected : ( 
            (defaultTime.getMinutes() > i) &&
            (defaultTime.getMinutes() <= (i + 5)) 
        )   
    }); 
}