<!DOCTYPE html><html><head><title>CT Traders</title><style>fieldset {width:40%; margin:0px 0px 10px 1%;}legend {padding:2px; text-indent:5px;}h2, p {margin-left: 1%;} input[type="submit"], input[type="reset"] {display:inline; float:none;}</style><script> //suggested logic for the validateInput() functionfunction validateInputs() {//check payment methodvar methodChecked = false;for (var i=0; i <document.frmCustOrders.class.length;i++){ if (document.frmCustOrders.class[i].checked ==true) { classChecked = true; vClass = document.frmCustOrders.class[i].value; }}//check customer index valuevar customerIndex = document.getElementById("customer").value;//retrieve order quantityvar qty = document.getElementById("qty").value;//validate form dataif (customerIndex == -1) //validate customer{ alert("Please select a customer.") return false;}else if () //validate qty{}else if (fsClassChecked == false) //validate payment method{ alert("Please select a payment method.") return false;}else //output{ orderEntries = customer+ "\n"+ qty+ "\n"+vClass; alert(orderEntries); return false;}}</script></head><body><h2>Customer Order</h2><form name="frmCustOrders" id="frmCustOrders"onsubmit="return validateInputs();" action=""><fieldset id="fsCustomer"><legend>Customer List</legend><select name="customer" id="customer" size="3"> <option>107 Paula Harris</option> <option>232 Mitch Edwards</option> <option>229 BTC</option></select></fieldset><p> <label for="qty">Order Quantity: </label><input type="text" name="qty" id="qty" /></p>我在獲取用于檢索表單上的選擇的輸出框時(shí)遇到問題。此外，在我的一個(gè) if 語句中，我被分配檢查該值是否在 1 到 999 之間，但我對(duì)此完全空白。我是編碼（Javascript）的新手，這是我的第一堂課。任何幫助使其工作的幫助將不勝感激。
從表單生成輸出框
冉冉說
2022-07-21 11:02:34
