function leftcol() { document.write('

'); document.write('

'); document.write(' Activated Carbon
'); document.write('

'); document.write(' Ion Exchange Resin
'); document.write('

'); document.write(' '); document.write('Anthracite Filter Media
'); document.write('

'); document.write(' Gravel Filter Media
'); document.write('

'); document.write(' Sand Filter Media
'); document.write('

'); document.write(' Garnet Filter Media
'); document.write('

'); document.write('

'); } function footer() { document.write(' '); document.write(' '); document.write(' '); document.write('

'); document.write('

'); document.write('

'); document.write('

'); document.write('

'); }