/* javascript component called 07-AUG-2007 11:26:24 with id apps_satreg */



// ensures same ad can't display in two slots of the same size
function removeFromAdList(alist, html) {
	var tmp = new Array();
	var j = 0;
	for (var i = 0; i < alist.length; i++) {
		if (alist[i] != html) { tmp[j] = alist[i] ; j++ }
	}
	return tmp;
}

// gets a random member of the array for that slot
function getAds(pos) {
	if (eval('window.' + pos)) {
		var adLength = eval(pos + '.length');
		var rndNum = Math.floor(Math.random() * adLength);
		var html = eval(pos + '[rndNum]');
		if (adLength > 0) {
			if (pos == 'top' || pos == 'bottom') {
				document.write(html);
				if (window.bottom) {
					bottom = removeFromAdList(bottom, html);
				} else if (window.bottom_left) {
					bottom_left = removeFromAdList(bottom_left, html);
					bottom_right = removeFromAdList(bottom_right, html);
				}
			} else if (pos == 'bottom_left') {
				document.write(html);
				bottom_right = removeFromAdList(bottom_right, html);
			} else {
				document.write(html);
			}
		}
	}
}

function getDoubleAds(pos) {

	ad_ar = eval('window.' + pos);

	if (ad_ar && ad_ar.length > 0) {
		document.write('<div id="ads">');
	
		var rndNum = Math.floor(Math.random() * ad_ar.length);
	
		document.write(ad_ar[rndNum]);
		ad_ar = removeFromAdList(ad_ar, ad_ar[rndNum]);

		// is there anything left in the array
		if (ad_ar.length > 0) {
			rndNum = Math.floor(Math.random() * ad_ar.length);
			document.write(ad_ar[rndNum]);
		}
		document.write('</div>');
	}
}





// gets a random member of the array (with getAds) and displays within HTML
function getAdsHTML(pos) {
	// prevent from breaking if not called correctly
	// calling with 'bottom' might mean one bottom array or two arrays for bottom_left and bottom_right
	if (pos == 'bottom') {
		if (!window.bottom && !window.bottom_left) { return }
	} else {
		if (!eval('window.' + pos)) { return }
	}
	
	if (pos == 'left') {
		getAds(pos);
	}
	else if (pos == 'bottom') {
		document.write('' +
			'<table cellpadding="0" cellspacing="0" border="0">' +
			'<tr><td><img src="/images/null_1x1.gif" width="16" height="1" border="0" alt=""></td>' +
			'<td>' ); 
		if (window.bottom) { getAds('bottom'); } else { getAds('bottom_left'); }
		document.write( '</td>' +
			'<td><img src="/images/null_1x1.gif" width="4" height="1" border="0" alt=""></td>' +
			'<td>' );
		if (window.bottom) { getAds('bottom'); } else { getAds('bottom_right'); }
		document.write( '</td></tr></table>' );
	}
	else {
		getAds(pos);
	}
}

var top = new Array();
top[0]  = '<a href="http://apps.collegeboard.com/ut/AffiliateJumpPage.jsp?DestURL=http%3A%2F%2Fwww%2Ecollegeboard%2Ecom%2Fapps%2Fqotd%2Fquestion&AffiliateID=1&BannerID=ba_40250"><img src="/images/ads/ba_40250.gif" width="182" height="70" alt="SAT preparation every day!" border="0"></a>';
var left_square = new Array();
left_square[0]  = '<a href="http://apps.collegeboard.com/ut/AffiliateJumpPage.jsp?DestURL=http%3A%2F%2Fwww%2Ecollegeboard%2Ecom%2Fapps%2Fqotd%2Fquestion&AffiliateID=1&BannerID=ba_28409"><img src="/images/ads/ba_28409.gif" width="125" height="125" alt="Daily SAT Prep" border="0"></a>';
var left_wide = new Array();
var left_wide2 = new Array();
left_wide2[0]  = '<a href="http://apps.collegeboard.com/ut/AffiliateJumpPage.jsp?DestURL=http%3A%2F%2Fwww%2Ecollegeboard%2Ecom%2Fapps%2Fqotd%2Fquestion&AffiliateID=1&BannerID=ba_40250"><img src="/images/ads/ba_40250.gif" width="182" height="70" alt="SAT preparation every day!" border="0"></a>';
var bottom_left = new Array();
bottom_left[0]  = '<a href="http://apps.collegeboard.com/ut/AffiliateJumpPage.jsp?DestURL=http%3A%2F%2Fwww%2Ecollegeboard%2Ecom%2Fapps%2Fqotd%2Fquestion&AffiliateID=1&BannerID=ba_28408"><img src="/images/ads/ba_28408.gif" width="234" height="60" alt="Daily SAT Prep" border="0"></a>';
var bottom_right = new Array();
bottom_right[0]  = '<a href="http://apps.collegeboard.com/ut/AffiliateJumpPage.jsp?DestURL=http%3A%2F%2Fwww%2Ecollegeboard%2Ecom%2Fapps%2Fqotd%2Fquestion&AffiliateID=1&BannerID=ba_28408"><img src="/images/ads/ba_28408.gif" width="234" height="60" alt="Daily SAT Prep" border="0"></a>';

var url = window.location.toString();
var left = new Array();
if ((url.indexOf('www.') != -1 && url.indexOf('/student/testing') != -1) ||
	(url.indexOf('apps.') != -1 && url.indexOf('cbsearch') != -1) ||
	 url.indexOf('qotd') != -1 ||
	 'top left_wide2 bottom_left bottom_right'.indexOf('wide') != -1) {
	left = left_wide;
} else {
	left = left_square;
}