/*
 * random.js :: md@northwestern-edu
 * Web Communications :: Northwestern University
 */


// global vars...

var url = new Array() ;
var description = new Array() ;
var tagline = new Array() ;
var rand_img = 0 ;
var rand_tag = 0 ;

// functions...

function add_image(image_url, image_description) {
	url[url.length] = image_url ;
	description[url.length] = image_description ;
}

function add_tag(tag) {
	tagline[tagline.length] = tag ;
}

function select_random_img() {
	rand_img = Math.floor(Math.random()*(url.length)) ;
}

function select_random_tag() {
	rand_tag = Math.floor(Math.random()*(tagline.length)) ;
}

function get_image_url() {
	return url[rand_img] ;
}

function get_image_description() {
	return description[rand_img] ;
}

function get_tagline() {
	return tagline[rand_tag] ;
}

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