Gets the hour value and the "time period" (AM/PM) based on the 24-hour you pass in (this code is VERY verbose for clarity)

hour12.js

var h = new Date().getHours();

if (h == 0)
{
	period = am
	hours = 12
}
else if (h > 0 && h < 12)
{
	period = am
	hours = h
}
else if (h == 12) 
{
	period = pm
	hours = 12
}
else if (h > 12 && h < 24)
{
	period = pm
	hours = h % 12
}
else if (h == 24)
{
	period = am
	hours = 12
	// date.getHours() should NEVER return 24 or greater.
	// If it has, something has gone horribly wrong!
}


// If you don't need to be verbose, this will suffice:
hours = (h % 12) || 12;
period = (h < 12) ? "AM" : "PM";