// Function to check data and manipulate necessary fields before posting
function post_check()
{
	if(title_check() && content_check() && contributor_check() && isAttachment() && url_check() && expiry())
		return true;
	else
		return false;
}

function top_post_check()
{
	if(title_check() && content_check() && contributor_check() && url_check() && expiry())
		return true;
	else
		return false;
}

// Function to check data and manipulate necessary fields before modifying
function modify_check()
{
	if(title_check() && content_modify_check() && url_check() && expiry())
		return true;
	else
		return false;
}

// The following functions relate to specific fields within the posting/modfiying form
// Function to ensure that something has been entered in the title field
function title_check()
{
	// check that a title has been added
	if (document.form1.title.value == "" || (document.form1.title.value == document.form1._wb_placeholder_title.value))
	{
		alert("Please enter a Title.");
		return false;
	}
	else
		return true;
}

function category_check()
{
		if (document.form1.category.options[document.form1.category.selectedIndex].value == "")
		{
			alert("Please select a Category");
			return false;
		}
		else
			return true;
}			

// If no content has been added, change the form's action and store value
function content_check()
{
	if (document.form1.content.value == "" || (document.form1.content.value == document.form1._wb_placeholder_content.value))
	{
		alert("Please enter a Long Description");
		return false;
	}
	return true;
}

function contributor_check()
{
	// check that a title has been added
	if (document.form1.contributor.value == "" || (document.form1.contributor.value == document.form1._wb_placeholder_contributor.value))
	{
		alert("Please enter a Contributor.");
		return false;
	}
	else
		return true;
}

function isAttachment()
{
	if (document.form1.url.value == "http://" && document.form1.attachment.value == "")
	{
			alert("Please enter either a Link or an Attachment");
			return false;
	}
	else
		return true;
}

// If url is just "http://" (the value given as a default when the form loads) reset it to ""
function url_check()
{
	if (document.form1.url.value == "http://")
		document.form1.url.value = "";
	return true;
}

function expiry()
{
	if (document.form1.expires.value == '' || (document.form1.expires.value == document.form1._wb_placeholder_expires.value))
	{
		if (document.form1.calendar.value != '' && (document.form1.calendar.value != document.form1._wb_placeholder_calendar.value))
			document.form1.expires.value = document.form1.calendar.value;
	}
	return true;
}

function isDateValid(name)
{
	var doThis = eval("document.form1." + name + ".value");
	if (doThis != '')
	{
		if (name == "expires")
			return isFutureDate(doThis,'Date to Remove from News');
		else if (name == "calendar")
			return isFutureDate(doThis,'Calendar');
	}
	placeholderBack(name)
}

function placeholderBack(name)
{
	var placeholder = eval("document.form1." + name);
	var defaultPlace = eval("document.form1._wb_placeholder_" + name + ".value");
		if(placeholder.value == '')
			placeholder.value = defaultPlace;
}

function remove_select(name)
{
	var placeholder = eval("document.form1." + name);
	var defaultPlace = eval("document.form1._wb_placeholder_" + name + ".value");
	
	if(placeholder.value == defaultPlace)
		placeholder.value = '';
	else
		placeholder.select();
}