var ic = 625; // Number of images available
var img_pref = "http://sykimtkd.com/imgs/syk_"; // Array to hold filenames 
//var img_pref = "imgs/syk_"; // Array to hold filenames 
var img_post = ".jpg";
var aryNum = new Array();
aryNum[0] = 0;
aryNum[1] = 0;
aryNum[2] = 0;
aryNum[3] = 0;

var numElements = aryNum.length;
var randNum = 0;

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

function isExist(randNum)
{
	for (i = 0; i < numElements; i++) {
		if (aryNum[i] == randNum)
			return true;
	}
	return false;
}



do {
	randNum = pickRandom(ic);
} while (isExist(randNum));
aryNum[0] = randNum;

do {
	randNum = pickRandom(ic);
} while (isExist(randNum));
aryNum[1] = randNum;

do {
	randNum = pickRandom(ic);
} while (isExist(randNum));
aryNum[2] = randNum;

do {
	randNum = pickRandom(ic);
} while (isExist(randNum));
aryNum[3] = randNum;


var imgsrc1 = img_pref + (aryNum[0]) + img_post; 
var imgsrc2 = img_pref + (aryNum[1]) + img_post; 
var imgsrc3 = img_pref + (aryNum[2]) + img_post; 
var imgsrc4 = img_pref + (aryNum[3]) + img_post;