<!DOCTYPE html>
<html>
<head>
<script type=”text/script”>
function account(price1,price2,price3,price4,price5){
var sum=form1.price1.value+form1.price2.value+form1.price3.value+form1.price4.value+form1.price5.value;
return sum;
}
</script>
</head>
<body>
<form name="form1" method ="post" action= "" >
书1:<input name="price1"type="text"id="price1"size="20">
书2:<input name="price2"type="text"id="price2"size="20">
书3:<input name="price3"type="text"id="price3"size="20">
书4:<input name="price4"type="text"id="price4"size="20">
书5:<input name="price5"type="text"id="price5"size="20">
总价：<input id="account()">
<input name="Button"type="button"class="btn_grey"onClick="account(price1,price2,price3,price4,price5)"value="总和">
</form>
</body>
</html>
怎么改才能实现功能