function col(li) {
if (li=="home")document.all.home.style.backgroundImage = 'url(images/on.gif)';
if (li=="bed")document.all.bed.style.backgroundImage = 'url(images/on.gif)';
if (li=="house")document.all.house.style.backgroundImage = 'url(images/on.gif)';
if (li=="tariff")document.all.tariff.style.backgroundImage = 'url(images/on.gif)';
if (li=="cottage")document.all.cottage.style.backgroundImage = 'url(images/on.gif)';
if (li=="offers")document.all.offers.style.backgroundImage = 'url(images/on.gif)';
if (li=="directions")document.all.directions.style.backgroundImage = 'url(images/on.gif)';
if (li=="availability")document.all.availability.style.backgroundImage = 'url(images/on.gif)';
if (li=="batharea")document.all.batharea.style.backgroundImage = 'url(images/on.gif)';
if (li=="access")document.all.access.style.backgroundImage = 'url(images/on.gif)';

}
function off(pu){
if(pu=="home")document.all.home.style.backgroundImage = 'url(images/off.gif)';
if(pu=="bed")document.all.bed.style.backgroundImage = 'url(images/off.gif)';
if(pu=="house")document.all.house.style.backgroundImage = 'url(images/off.gif)';
if(pu=="tariff")document.all.tariff.style.backgroundImage = 'url(images/off.gif)';
if(pu=="cottage")document.all.cottage.style.backgroundImage = 'url(images/off.gif)';
if(pu=="offers")document.all.offers.style.backgroundImage = 'url(images/off.gif)';
if(pu=="directions")document.all.directions.style.backgroundImage = 'url(images/off.gif)';
if(pu=="availability")document.all.availability.style.backgroundImage = 'url(images/off.gif)';
if(pu=="batharea")document.all.batharea.style.backgroundImage = 'url(images/off.gif)';
if(pu=="access")document.all.access.style.backgroundImage = 'url(images/off.gif)';

}