function getStyleObject(objectId){

	// checks W3C DOM, then MSIE 4, then NN 4.

	if(document.getElementById && document.getElementById(objectId)){
		return document.getElementById(objectId).style;
	}
	else if (document.all && document.all(objectId)){
		return document.all(objectId).style;
	}
	else if (document.layers && document.layers[objectId]){
		return document.layers[objectId];
	}
	else {
		return false;
	}
}

function toggleDiv(whichDiv){

	var divStyle = getStyleObject(whichDiv);

	if (divStyle.display=="none"){
		divStyle.display=""
	}
	else{
		divStyle.display="none"
	}
}