current_overID = '';
last_img = '';
last_click = '';

function topNavOver (imgName) {
	if (document.images) {
		top.frames[1].document.images [imgName].src = "./images/" + imgName +"_on.gif";
		if (last_img != '' && last_img != imgName && last_click != last_img) {
			top.frames[1].document.images[last_img].src = "./images/" + imgName +"_off.gif";
		}
		last_img = imgName;
	}
}

function topNavOff (imgName) {
	if (document.images) {
		if (last_click != imgName) {
			parent.parent.frames[1].document.images[imgName].src = "./images/" + imgName +"_off.gif";
		}
		last_img = '';
	}
}

function turnOn(xsImageOn) {
	var agt=navigator.userAgent.toLowerCase(); 
	var is_win = ( (agt.indexOf("win")!=-1) || (agt.indexOf("16bit")!=-1) )
	var is_ie = (agt.indexOf("msie") != -1); 
	this_click = xsImageOn
	if (this_click != '') {
		if (is_win && is_ie) {
			top.frames[1].document.images.about.src = "images/about_off.gif";
			top.frames[1].document.images.overview.src = "images/overview_off.gif";
			top.frames[1].document.images.contact.src = "images/contact_off.gif";
			if (this_click != 'blank'){
				top.frames[1].document.images[this_click].src = "images/" + this_click +"_on.gif";
			}
		} else {
			top.frames[1].document.images.about.src = "../images/about_off.gif";
			top.frames[1].document.images.overview.src = "../images/overview_off.gif";
			top.frames[1].document.images.contact.src = "../images/contact_off.gif";
			if (this_click != 'blank'){
				top.frames[1].document.images[this_click].src = "../images/" + this_click +"_on.gif";
			}
		}
	}
	last_click = this_click;
}

function mouseover (imgName) {
	if (document.images) {

		self.document.images [imgName].src = "./images/" + imgName +"_on.gif";

//		if (last_img != '' && last_img != imgName) {

//			self.document.images [last_img].src = "images/" + last_img +"_off.gif";

////		}

		last_img = imgName;

	}

}



function mouseoff (imgName) {

	if (document.images) {

		self.document.images [imgName].src = "./images/" + imgName +"_off.gif";

		last_img = '';

	}

}

function waittillcomplete() {
		
	if (top.frames[1].document.readyState == "complete") {
		top.frames[1].turnOn('blank')
  	}
}