var wgtnAds = new Array();
var chchAds = new Array();

/*
three parameters:
1. relative URL to ad image;
2. URL (relative or absolute) for what the ad should link to;
3. Alt text for image (mandatory)
*/

wgtnAds[0]  = new Array('http://www.craft2.org/images/wgtnsponsorlogos/Knitsch.gif','http://knitschyarns.co.nz','knitsch');
wgtnAds[1]  = new Array('http://www.craft2.org/images/wgtnsponsorlogos/wgtnadfelt_weblogo.png','http://www.felt.co.nz','felt');
wgtnAds[2]  = new Array('http://www.craft2.org/images/wgtnsponsorlogos/wgtnadphantom60x132.png','http://www.0800phantom.co.nz/','0800phantom/');
wgtnAds[3]  = new Array('http://www.craft2.org/images/wgtnsponsorlogos/wgtnadwswlogo.gif','http://worldsweetworld.com','worldsweetworld');
wgtnAds[4]  = new Array('http://www.craft2.org/images/wgtnsponsorlogos/wgtnadwswlogo.gif','http://www.fringe.org.nz/','fringe');
wgtnAds[5]  = new Array('http://www.craft2.org/images/wgtnsponsorlogos/wgtnadwswlogo.gif','http://worldsweetworld.com','worldsweetworld');
wgtnAds[6]  = new Array('http://www.craft2.org/images/wgtnsponsorlogos/rdp.gif','http://www.rdp.co.nz','rdp');

// etc.

chchAds[0]  = new Array('http://www.craft2.org/images/wgtnsponsorlogos/wgtnadcraftrunner-craftybird-flat.png','http://www.craftrunner.co.nz','craftrunner');
chchAds[1]  = new Array('http://www.craft2.org/images/wgtnsponsorlogos/wgtnadfelt_weblogo.png','http://www.felt.co.nz','felt');
chchAds[2]  = new Array('http://www.craft2.org/images/wgtnsponsorlogos/wgtnadphantom60x132.png','http://www.0800phantom.co.nz/','0800phantom/');
chchAds[3]  = new Array('http://www.craft2.org/images/wgtnsponsorlogos/wgtnadwswlogo.gif','http://worldsweetworld.com','worldsweetworld');
chchAds[4]  = new Array('http://www.craft2.org/images/wgtnsponsorlogos/wgtnadnzlive.png','http://www.nzlive.com','nzlive');
chchAds[5]  = new Array('http://www.craft2.org/images/chchsponsorlogos/ccadCCAC.gif','http://www.artschristchurch.org.nz','ccac');
chchAds[6]  = new Array('http://www.craft2.org/images/chchsponsorlogos/ccadCupcakeParlour.gif','http://cupcakeparlour.co.nz','cupcake parlour');
chchAds[7]  = new Array('http://www.craft2.org/images/chchsponsorlogos/ccadPrintStop.gif','http://www.printstop.co.nz','printstop');
chchAds[8]  = new Array('http://www.craft2.org/images/chchsponsorlogos/ccadWWKIP.gif','http://www.knit.org.nz/','knit');
chchAds[9]  = new Array('http://www.craft2.org/images/chchsponsorlogos/ccadchArtsCentre.gif','http://www.artscentre.org.nz/','artscenter');
chchAds[10]  = new Array('http://www.craft2.org/images/chchsponsorlogos/hands.png','http://www.hands.co.nz','HandsAshfordCraftStore');
// etc.

var whichWgtn = Math.floor(Math.random()*wgtnAds.length);
var whichChch = Math.floor(Math.random()*chchAds.length);

preBufferWgtn = new Image();
preBufferWgtn.src = wgtnAds[whichWgtn][0];

preBufferChch = new Image();
preBufferChch.src = chchAds[whichChch][0];
 
function showWgtn() {
	if(whichWgtn <= wgtnAds.length) {
    	document.write('<a href="'+wgtnAds[whichWgtn][1]+'"><img src="'+wgtnAds[whichWgtn][0]+'" border="0" alt="'+wgtnAds[whichWgtn][2]+'"></a>');
	} else { 
		document.write('<a href="'+wgtnAds[wgtnAds.length-1][1]+'"><img src="'+wgtnAds[wgtnAds.length-1][0]+'" border="0" alt="'+wgtnAds[wgtnAds.length-1][2]+'"></a>');
	}
}

function showChch() {
	if(whichChch <= chchAds.length) {
    	document.write('<a href="'+chchAds[whichChch][1]+'"><img src="'+chchAds[whichChch][0]+'" border="0" alt="'+chchAds[whichChch][2]+'"></a>');
	} else { 
		document.write('<a href="'+chchAds[chchAds.length-1][1]+'"><img src="'+chchAds[chchAds.length-1][0]+'" border="0" alt="'+chchAds[chchAds.length-1][2]+'"></a>');
	}
}