function showBlowup(divID, imageID) {
	if(document.layers) {
		// Navigator 4 model
		var divObject = document.layers[divID]
		var imageObject = document.images[imageID]
		divObject.pageX = imageObject.x
		divObject.pageY = imageObject.y
		divObject.visibility = "visible"
	} else if(document.all) {
		// Internet Explorer model
		var divStyle = document.all.item(divID).style
		var imageObject = document.images[imageID]
		divStyle.posLeft = (window.event.clientX - window.event.offsetX)
		divStyle.posTop = (window.event.clientY - window.event.offsetY + document.body.scrollTop)
		if (navigator.appVersion.indexOf("Mac") >= 0) { // work around Mac IE bug
			divStyle.posTop -= document.body.scrollTop
		}
		divStyle.visibility = "visible"
	}
}

function showBlowupInNewWindow(imageFileURL,width,height) {
	// Workaround for Navigator 6
	windowOptions = "directories=0,menubar=0,personalbar=0,status=0,resizable=1,width="
	windowOptions += width + ",height=" + height
	window.open(imageFileURL,"nav6workaround",windowOptions)
}

function hideBlowup(divID) {
	if(document.layers) {
		var divObject = document.layers[divID]
		divObject.visibility = "hidden"
	} else if (document.all) {
		// Use IE DHTML
		var divStyle = document.all.item(divID).style
		divStyle.visibility = "hidden"
	}
}