var gh_rates = new Object; 
gh_rates['usd']=1.58; 
gh_rates['gbp']=1; 
gh_rates['eur']=1.20; 
gh_rates['aud']=1.47; 
gh_rates['zar']=12.15; 
gh_rates['cad']=1.57; 
gh_rates['chf']=1.45; 
gh_rates['thb']=48.77;