// Конверсия угла

var chk4=true;
var D4=0;
var n4=0;
D4v=new Array(1, 0.9000009, 360, 57.2958, 0.01666667, 0.0002777778);
switch (lng) {
	case "eng":
D4n=new Array("degree", "grad", "rev.", "rad", "min", "sec");
	break;
	case "rus":
D4n=new Array("гр", "град", "оборот", "радиан", "минута", "секунда");
	break;
	default:
	break;
	}

function res4()
{D4=0;
n4=0;
chk4=true;}

function insert4()
{
chk4=true;
n4 = parseFloat(document.dim4.n.value.replace(/,/g,".")); 
if(isNaN(n4)){alert(alt08_01); document.dim4.n.focus(); return true;};
D4 = document.dim4.D.selectedIndex
n4 = Math.abs(n4);
document.dim4.na.value=n4+D4n[D4];
chk4=false;
}

function insertN4()
{
if(chk4){return true};
insert4()
}

function calc4()
{
if(chk4){return true};
Da = document.dim4.D.selectedIndex;
n_new=n4*D4v[D4]/D4v[Da];
document.dim4.n.value =n_new; 
}