function swapImg(img1,img2) {
	if (document.images) {
		document[img1].src = img2;
	}
}

function swapImg_main(imgnum,state,defaultnum) {
	if (document.images) {
		if (state=="on") {
			if (defaultnum!=0) {
				document["main"+defaultnum].src = "../images/main_nav_"+defaultnum+"_off.gif";
			}
			document["main"+imgnum].src = "../images/main_nav_"+imgnum+"_on.gif";
		} else if (state=="off") {
			document["main"+imgnum].src = "../images/main_nav_"+imgnum+"_off.gif";
			if (defaultnum!=0) {
				document["main"+defaultnum].src = "../images/main_nav_"+defaultnum+"_on.gif";
			}
		}
	}
}


function swapImg_thumb(imgnum,state,defaultnum) {
	if (document.images) {
		if (state=="on") {
			if (defaultnum!=0) {
				document["thumb"+defaultnum].src = "../images/thumb_"+defaultnum+"_off.gif";
			}
			document["thumb"+imgnum].src = "../images/thumb_"+imgnum+"_on.gif";
			document["thumb_ro"].src = "../images/thumb_ro_"+imgnum+".gif";
		} else if (state=="off") {
			document["thumb"+imgnum].src = "../images/thumb_"+imgnum+"_off.gif";
			if (defaultnum!=0) {
				document["thumb"+defaultnum].src = "../images/thumb_"+defaultnum+"_on.gif";
			}
			document["thumb_ro"].src = "../images/thumb_ro_"+defaultnum+".gif";
		}
	}
}