function GetSumm() {
var s = 0;
s = parseInt(document.order_form.user_count.value, 0);
if (document.order_form.ch_1.checked) s=s+3500;
if (document.order_form.ch_2.checked) s=s+2800;
if (document.order_form.ch_3.checked) s=s+3800;
if (document.order_form.ch_4.checked) s=s+4200;
if (document.order_form.ch_5.checked) s=s+3300;
if (document.order_form.ch_6.checked) s=s+2600;
if (document.order_form.ch_7.checked) s=s+1400;
if (document.order_form.ch_8.checked) s=s+2600;
if (document.order_form.ch_9.checked) s=s+2800;
if (document.order_form.ch_10.checked) s=s+4200;
if (document.order_form.ch_11.checked) s=s+3200;
if (document.order_form.ch_12.checked) s=s+1500;
if (document.order_form.ch_13.checked) s=s+2400;
if (document.order_form.ch_14.checked) s=s+1200;
if (document.order_form.ch_15.checked) s=s+3500;
if (document.order_form.ch_16.checked) s=s+600;
if (document.order_form.ch_17.checked) s=s+18000;
if (document.order_form.ch_18.checked) s=s+3500;
document.getElementById("sum_result").innerHTML=s;
}