Need a fast solution to make a search field show a page

I need a fast fix to a static website. I need the existing search field to work for one page: sna348.htm This is a temporary fix for a presentation. The site is complete. Can you build a simple php script to show the page when (3*4) the user types "sna348" site://givemehope.net The field requires a minimum of six characters, maximum eight. The field is alpha numeric The "#" sign is allowed. NO other special characters Need validation: Make border RED and I need this done in less than an hour tand then I will cponsider you for longer term work.