[DarkMilkMan]

Вот код

<form action="" method="post" id="frm" onsubmit="return checkForm()"> 
<div id="mydiv" style="display:block;">
					<div id="mydiv-block">
					<input type="radio" name="ves" id="ves1" value="0" class="test"
					onchange="addIt(this.value = this.checked ? 10 : 0)">
					<label for="ves1">от 1кг до 3кг</label>
					</div>
					
					<div id="mydiv-block">
					<input type="radio" name="ves" id="ves2" value="0" class="test"
					onchange="addIt(this.value = this.checked ? 100 : 0)">
					<label for="ves2">от 3кг до 5кг</label>
					</div>
					
					<div id="mydiv-block">
					<input type="radio" name="ves" id="ves3" value="0" class="test"
					onchange="addIt(this.value = this.checked ? 1000 : 0)">
					<label for="ves3">от 5кг до 15кг</label>
				    </div>
				</div>
				 <label for="price" class="name-mail-php">Стоимость товара, рос. руб.:<span>*</span></label><br>
            <input type="number" id="price" name="price" maxlength="300" required onchange="addIt()" ><br>
            <label for="pricedeliv" class="name-mail-php">Стоимость комиссии за доставку в РБ, рос. руб.:</label><br>
            <input type="number" id="pricedeliv" name="pricedeliv"  maxlength="300" required readonly onkeyup="addIt()"><br><span2>10% от стоимости заказа</span2>
				<div id="maineu-dost">
				Стоимость доставки:<input type="number" id="dostavkas" value="0" readonly>руб
				</div>
				<input type="number" id="itog" name="789" maxlength="300" readonly><br>
				</form>
<script type="text/javascript">
<!--
function addIt() { 
var value1 = parseInt(document.getElementById("ves1").value);
var value2 = parseInt(document.getElementById("ves2").value);
var value3 = parseInt(document.getElementById("ves3").value); 
var value4 = parseInt(document.getElementById("price").value);
var value5 = parseInt(document.getElementById("pricedeliv").value);
var value6 = parseInt(document.getElementById("dostavkas").value);
document.getElementById("pricedeliv").value = 0.1 * value4;
document.getElementById("itog").value = value1 + value2 + value3 + value4 + value5 + value6;
document.getElementById("dostavkas").value = value1 + value2 + value3;
}
// -->
</script>