function messageTo (name, location, subject, text)
{
	var address;
	if (name && location)
	{
		address = "mailto:" + name + "@" + location;	
		if (subject || text)
		{
			address += "?";
			
			if (subject)
			{
				address += "subject=" + escape(subject);
				if (text)
				{
					address += "&body=" + escape(text);
				}
			} else 
			{
					address += "body=" + escape(text);
			}
		}
	} else {
		address = "mailto:";
	}
	
	window.open (address);
}