function price()
    {
        if (document.calc.area.value){
            var area=parseFloat(document.calc.area.value);
        }
        else area=0;
        if (document.calc.thickness.value){
            var thickness=parseFloat(document.calc.thickness.value);
        }
        else{
            thickness=0;
        }
        var range=area*thickness/1000;
        var total=parseFloat(range*10000);
        var totals = total + ' руб.';
        document.getElementById("range").innerHTML=range;
        document.getElementById("counted").innerHTML=totals;
    }