/* http://www.hypergurl.com/randomimage.html */
/* IMAGE RANDOMIZER ON RELOAD */

/* : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : set variables */

var dotd = 5;     /* Number of alternative images for Discovery of the Day */
var pi = 5;       /* Number of alternative images for Plug In */

var rotateDOTD = new Array(dotd);  /* Array to hold filenames */
	rotateDOTD[0] = "http://dsc.discovery.com/images/homepage/discovery-of-day1.jpg"; 
	rotateDOTD[1] = "http://dsc.discovery.com/images/homepage/discovery-of-day2.jpg"; 
	rotateDOTD[2] = "http://dsc.discovery.com/images/homepage/discovery-of-day3.jpg"; 
	rotateDOTD[3] = "http://dsc.discovery.com/images/homepage/discovery-of-day4.jpg"; 
	rotateDOTD[4] = "http://dsc.discovery.com/images/homepage/discovery-of-day5.jpg"; 
	
var rotatePI = new Array(pi);  /* Array to hold filenames */
	rotatePI[0] = "http://dsc.discovery.com/images/homepage/plug-in1.jpg"; 
	rotatePI[1] = "http://dsc.discovery.com/images/homepage/plug-in2.jpg"; 
	rotatePI[2] = "http://dsc.discovery.com/images/homepage/plug-in3.jpg"; 
	rotatePI[3] = "http://dsc.discovery.com/images/homepage/plug-in4.jpg"; 
	rotatePI[4] = "http://dsc.discovery.com/images/homepage/plug-in5.jpg"; 


/* : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : functions  */
/* document.writeln('<img src="'+rotateDOTD[imagesDOTD]+'" width="160" height="224" border="0" >'); 
*/

function pickRandom(range) {
	if (Math.random)
		return Math.round(Math.random() * (range-1));
	else {
		var now = new Date();
		return (now.getTime() / 1000) % range;
	}
}

var imagesDOTD = pickRandom(dotd);
var imagesPI = pickRandom(pi);