document.write('<form id="switchform">');
document.write('<p id="switch">');
document.write('背景色の変更&nbsp;:&nbsp;');
document.write('<a href="javascript:setActiveStyleSheet(\'default\');" accesskey="w" return false;" return false;">白<kbd>w</kbd></a>｜');
document.write('<a href="javascript:setActiveStyleSheet(\'darkback\');" accesskey="b" return false;" return false;">黒<kbd>b</kbd></a>');
document.write('</p>');
document.write('</form>');