trying to use HTML form variables in Java

I'm trying to get some HTML form variables to use in Java.
here is the code:

/
function DisplayFindings();
//********************************************************

var dHours = parseInt(txtStatementHours);
var dUsageCost = parseFloat(txtKWHCost);
var dAmount = dHours * dUsageCost;
// display the potential rebate

var msg = "Your Statement Bill is: " + dAmount + "\n\n";
alert(msg);
}

********************

the HTML form Variables are :

txtStatementHours
txtKWHCost

They are user entered into the html form...

I'd really prefer not to use the "alert" function call.. I hate popups...

Any help would be appreciated.

Spartan117