function DisplaySearchForm()
{var radio=document.getElementById('radio_cameras');if(radio.checked)
{document.getElementById('search_cameras').style.display='block';}
else
{document.getElementById('search_cameras').style.display='none';}
radio=document.getElementById('radio_lens');if(radio.checked)
{document.getElementById('search_lens').style.display='block';}
else
{document.getElementById('search_lens').style.display='none';}}