所以大约一个小时后,我们找不到一个关于如何使用这些标签及其ID,名称和值来获得十进制数量来完成我的表单总结的好教程。简单地说,我有一个选择框,并希望它返回我的选项值和该选项值的数量。
继承HTML
<tr>
<th colspan="4" class="label">Shipping Method:
<select name="shipMethod" id="shipMethod" size="1">
<option value="">Choose a shipping method</option>
<option value="priority2">Priority mail $3.20 (4 items or less)</option>
<option value="priority3">Priority mail $4.30 (6 items or less)</option>
<option value="priority4">Priority mail $5.40 (8 items or less)</option>
<option value="overnight">Express $15.75 (4 items or less only)</option>
<option value="UPS">UPS - 2 day $15.00 (9 - 49 items)</option>
<option value="free">Free shipping (50+ items only)</option>
</select>
</th>
<td><input name="shippingChg" id="shippingChg" type="text" size="10" maxlength="60" value="" /></td>
</tr>
<tr>
可能我的第一个问题是为小数方设置一个循环。这就是我试图为一个选择框编写循环和函数的方法
function ship_some_stuff()
var ship_me= document.getElementById("shipMethod").value; (unsure if this returns
the option value though, but the idea is to save to a variable later)
if ship_me == priority2 {
var shipthisway = 3.20;
document.getElementById("shippingCHg").value = varshipthisway ;
}
if ship_me == priority3{
var shipthisway = 4.30;
document.getElementById("shippingCHg").value = varshipthisway ;
}
else varship == ""; {
alert("You haven't selected a shipping Method");
}
感谢您的帮助!
答案 0 :(得分:0)
使用jQuery:
var shippingPrice = false;
switch($("#shipMethod").val())
{
case "priority2":
shippingPrice = "3.20";
break;
case "priority3":
shippingPrice = "4.30";
break;
// and so on
}
if (shippingPrice)
$("#shippingChg").val(shippingPrice);
else alert("You haven't selected a shipping method.");
答案 1 :(得分:0)
function get_shipping_charge() {
var ship_me= document.getElementById("shipMethod").value;
if (ship_me == "priority2") return 3.20;
else if (ship_me == "priority3") return 4.30;
else return NaN;
}
function do_shipping_charge() {
var shipthisway = get_shipping_charge();
if (shipthisway) document.getElementById("shippingCHg").value = shipthisway;
else alert("You haven't selected a shipping Method");
}