// Validates the Add Photo form
function validate() {	
	
	message='';
	
	// IMAGE INFORMATION
	if (document.photos.photo_filename.value=='')
	{
		message += 'Image is required.\r\n';
	}		
	if (document.photos.photo_filename.value!='')
	{
		field_value = document.photos.photo_filename.value;
		field_length = field_value.length;
		start = field_length - 3;
		extension = field_value.slice(start,field_length)
		if (extension != 'jpg'  && extension != 'JPG' && extension != 'gif' && extension != 'GIF')
		{
			message += 'Images must be in JPG or GIF format.\r\n';
		}
	}
	
	// ALERT
	if (message!='')
	{
		alert(message);
		return false;
	}
	else
	{
		return true;
	}		
}