function confirmFields(formName) {
	var errorMessage = "";

	for (var i = 0; i < document.forms[formName].elements.length; i++) {
	if (document.forms[formName].elements[i].value == "" && document.forms[formName].elements[i].attributes["required"] != null )
      errorMessage += "*   " + document.forms[formName].elements[i].attributes["required"].value + "\n";
	}

	if (errorMessage != "") {
		alert ("Please fill in the following fields:\n\n" + errorMessage);
		return false;
	} else return true;
}

function openPreviewWindow(src)
{
	window.open(src, 'previewWindow', 'width=500, height=500');
}