function calc()

{var lambda, mu, rho, ws, wq, ls, lq;
lambda=document.post.lambda.value;
mu=document.post.mu.value;
rho=lambda/mu;
ls=rho/(1-rho);
lq=(rho*rho)/(1-rho);
ws=ls/lambda;
wq=lq/lambda;
document.post.rho.value=rho;
document.post.ls.value=ls;
document.post.lq.value=lq;
document.post.ws.value=ws;
document.post.wq.value=wq;

if(document.post.rho.value>1)
   {window.alert("Traffic density must be less than 1. Data error.");

document.post.reset.click();};

if(document.post.rho.value=="NaN")
   window.alert(" Data Error - Try Again");


}