function calculator()
{
    var vstavka = 0.00;
    var profile = 30.00;
    var corners = 25.00;
    var lamp = 60.00;
    var min_area = 6.00;
    var area = 0.00;
    // var installation = 0.00;
    var install = 75.00;
    var min_install = 450.00;
    var curvilinear = 50.00;
    // var re = /^[-]?\d*\.?\d*$/;

 // alert(vstavka);

    if (document.calc.area.value>=min_area) {installation = document.calc.area.value * install} else {installation = min_install;}
    html = (document.calc.price.value * document.calc.area.value) + (document.calc.perimeter.value * vstavka) + (Math.ceil(document.calc.perimeter.value / 2.50) * 2.50 * profile) + (document.calc.corners.value * corners) + (document.calc.lamp.value * lamp) + installation + (document.calc.curvilinear.value * curvilinear);

//  alert(html);



    span.innerHTML= '<b>Ориентировочная стоимость изготовления и монтажа:</b><div style="font-size: 150%;"><b>' + Math.ceil(html) + ',00 грн.</b></div>';
    // span=document.getElementById('submit');
    document.calc.submit.value = 'Пересчитать';
document.calc.rez.value = html;
    // return false;
}

function test()
{
alert("test");
}