var gh_rates = new Object; 
gh_rates['usd']=1.66; 
gh_rates['gbp']=1; 
gh_rates['eur']=1.12; 
gh_rates['aud']=1.82; 
gh_rates['zar']=12.47; 
gh_rates['cad']=1.77; 
gh_rates['chf']=1.69;