function swapHeader(layer) {

	if (layer=='signupform') {
		document.getElementById('loginoptions').style.display='none';
		document.getElementById('loginbox').style.display='none';
		document.getElementById('signupbox').style.display='block';
	} else if (layer=='loginform') {
		document.getElementById('loginoptions').style.display='none';
		document.getElementById('loginbox').style.display='block';
		document.getElementById('signupbox').style.display='none';
	}

	return;

}

function showHide(layer) {
	ls = document.getElementById(layer).style;
	if (ls.display=='block') {
		ls.display='none';
	} else {
		ls.display='block';
	}
	return;
}

function show(layer) {
	ls = document.getElementById(layer).style;
	ls.display='block';
	return;
}

function hide(layer) {
	ls = document.getElementById(layer).style;
	ls.display='none';
	return;
}

function HandleImgError(imageObj) {
	imageObj.src = "/ims/missingimage.gif";
}