function dtr(form)
{
var degrees = eval(form.degrees.value);
var y = ((degrees/360)*(3.141592*2));
form.radians.value = y;
}
function rtd(form)
{
var radians = eval(form.radians.value);
var z = (radians/(3.141592*2)*360);
form.degrees.value = z;
}