function bannerObj(source,url){
	this.source = source;
	this.url = url;
}

function addBanner(path,href){
	imgArr[imgArr.length] = new bannerObj(path,href);	
}

function putBanner(){
	if(imgArr.length>0){
		var i=Math.floor(Math.random()*imgArr.length);
		var source=imgArr[i].source;
		var url=imgArr[i].url;	
		document.writeln('<a href="'+url+'" target="_top"><img src="'+source+'" border="0"></a>');
	}
}