function showhide(elementid){
if (document.getElementById(elementid).style.display == 'none'){
document.getElementById(elementid).style.display = '';
} 
else {
document.getElementById(elementid).style.display = 'none';
}
}


function sall(){
var ids = new Array('AntitrustTradeRegulation','AviationLaw','BusinessIndustry','CivilRights','DebtorandCreditor','EmploymentLabor','Enviromental','EstatePlanning','Finance','Goverment','HealthCareSocial','IntellectualProperty','InternationalLaw','Leisure','Litigation','RealEstate', 'ScienceTechnology'); // IDs of your <div>s
for (var i=0; i<ids.length; i++) { 
if (document.getElementById(ids[i]).style.display == 'none'){
document.getElementById(ids[i]).style.display = '';
} 
}
}


function hall(){
var ids = new Array('AntitrustTradeRegulation','AviationLaw','BusinessIndustry','CivilRights','DebtorandCreditor','EmploymentLabor','Enviromental','EstatePlanning','Finance','Goverment','HealthCareSocial','IntellectualProperty','InternationalLaw','Leisure','Litigation','RealEstate', 'ScienceTechnology'); // IDs of your <div>s
for (var i=0; i<ids.length; i++) { 
document.getElementById(ids[i]).style.display = 'none';
}
}