Bit of jQuery that changes a message when the page loads, dpending on the current hour.

updating-tagline.js

// changes based on current time
var time = new Date().getMinutes();
// sets the time to every ten minutes
var index = Math.floor(time/10);
var json = {
	0:"Clever message zero.",
	1:"Clever message one.",
	2:"Clever message two.",
	3:"Clever message three.",
	4:"Clever message four.",
	5:"Clever message five."
};
function getTagline(json, index) {
    //gets message that corresponds to time index
    $('#tagline').html(json[index]);
}
$(document).ready(function() {
    getTagline(json, index);
    //you can click on the field to advance and loop through messages
    $('#tagline').on('click', function(){
        if (index == 5) {index = -1;}
        getTagline(json, index+=1);
    })
})