if(document.location.href.indexOf('page178.htm') > -1){
function choose_on(entry){                  
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}                  
function choose_off(entry){                  
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}      
}

if(document.location.href.split('/')[3] == 'page217.htm'){
function choose_on(entry){                  
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}                  
function choose_off(entry){                  
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  document.getElementById('content_' + entry).style.display = 'none';                  
}      
}