function sw(pr,lnk) {
   var pro=document.getElementById(pr), 
       lnko=document.getElementById(lnk);
   if (pro.className=='known')
   {pro.className='knownVis';lnko.className='knownlinkVis';}
   else 
   {pro.className='known';lnko.className='knownlink';};
};

window.onload=function(){
    if( !document.getElementById||
        !document.getElementsByTagName||
        !document.firstChild||
        !document.firstChild.removeChild||
        !document.firstChild.parentNode)
        return;

    var
        a=document.getElementsByTagName('p'),
        i=a.length,
        b;
    while(i-->0){
        if (a[i].className=='knownVis') { 
            a[i].className='known';
            b=a[i].id;
            (document.getElementById(b.substr(1))).href=
'javascript:sw(\''+b+'\',\''+b.substr(1)+'\')';
        }
    };
};