// functions for image swapping slideshow
function AdRotator(imgTagNameAttribute, adURLs, adImageURLs, rotationTime, adRotatorVarName) {
	this.imgTagNameAttribute = imgTagNameAttribute;
	this.adURLs = adURLs;
	this.adImageURLs = adImageURLs;
	this.rotationTime = rotationTime;
	this.adRotatorVarName = adRotatorVarName;
	this.index = 0;
	this.adImages = new Array(adImageURLs.length);
	for(var i=0; i<adImageURLs.length; ++i) {
		this.adImages[i] = new Image();
		this.adImages[i].src = adImageURLs[i];
	}
	this.writeHTML = AdRotator_writeHTML;
	this.start = AdRotator_start;
	this.rotate = AdRotator_rotate;
	// this.handleClick = AdRotator_handleClick;
}

function AdRotator_writeHTML() {
	// document.write('<a href="javascript:void(0)" ');
	// document.write('onclick="' + this.adRotatorVarName + '.handleClick()">');
	document.write('<img name="' + this.imgTagNameAttribute + '" border=0 ');
	document.write('src="' + this.adImageURLs[0] + '" class="imgMain"><br>');
	// document.write('</a>');
}

function AdRotator_start() {
	window.setInterval(this.adRotatorVarName + '.rotate()', this.rotationTime);
}

function AdRotator_rotate() {
	++this.index;
	this.index %= this.adImageURLs.length;
	document.images[this.imgTagNameAttribute].src = this.adImages[this.index].src;
}

function AdRotator_handleClick() {
	setTimeout("window.location.href = '"+this.adURLs[this.index]+"'",500);
}