//show hide div functions
function show(c) { 
 if (document.getElementById && document.getElementById(c)!= null) 
 node = document.getElementById(c).style.display=''; 
 else if (document.layers && document.layers[c]!= null) 
 document.layers[c].display = ''; 
 else if (document.all) 
 document.all[c].style.display = ''; 
 } 
 
 function hide(c) { 
 if (document.getElementById && document.getElementById(c)!= null) 
 node = document.getElementById(c).style.display='none'; 
 else if (document.layers && document.layers[c]!= null) 
 document.layers[c].display = 'none'; 
 else if (document.all) 
 document.all[c].style.display = 'none'; 
 }
 
 function tab1() {
 show('reviewOne');
 hide('reviewTwo');
 hide('reviewThree');
}
 
 function tab2() {
 hide('reviewOne');
 show('reviewTwo');
 hide('reviewThree');
}
 
 function tab3() {
 hide('reviewOne');
 hide('reviewTwo');
 show('reviewThree');
}