A Simple Page
function calcArea(){
inpRadius = 3;
alert(Math.PI * ((inpRadius)*(inpRadius)));
}
function calcPeri()
{
inpRadius = 3;
alert(2 * Math.PI * (inpRadius));
}
function calcVol()
{
inpRadius = 3;
alert(Math.PI * ((inpRadius)*(inpRadius)*(inpRadius)) * (4/3));
}