我是 javascript 的新手,我正在努力使用以下代码,该代码将以注册多个候选人的形式出现。
它为每个候选人创建 2 个相关的选择框(国家和地区)。
单击“添加候选者”按钮一次可以使相关框正常工作,但再次单击该按钮会使其停止工作。当有多个候选人时,从表单中访问选定的值也是不可能的,因为它们会相互覆盖。
我尝试使用计数变量将选择名称创建为数组,每次调用 ff 函数时我都会递增该变量,但我无法让它工作。
所有帮助将不胜感激!
<html>
<head>
<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.3/jquery.min.js" type="text/javascript"></script>
<title>Select Populate Test</title>
<script>
var UnitedStates = new Array();
UnitedStates[0] = "Texas";
UnitedStates[1] = "California";
UnitedStates[2] = "Arizona";
UnitedStates[3] = "Nevada";
UnitedStates[4] = "Florida";
var UnitedKingdom = new Array();
UnitedKingdom[0] = "Surrey";
UnitedKingdom[1] = "Kent";
UnitedKingdom[2] = "Dorset";
UnitedKingdom[3] = "Hampshire";
function populateDropdown(arry)
{
document.myForm.stateSelect.options.length = 0;
for (var i = 0; i < arry.length; i++)
{
document.myForm.stateSelect.options[i] = new Option(arry[i], arry[i]);
}
}
function updateDropdown(str)
{
var stateArray
var selectedCountry;
var countryDropdown = document.myForm.countrySelect;
for (var i = 0; i < countryDropdown.options.length; i++)
{
if (countryDropdown.options[i].selected)
{
selectedCountry = countryDropdown.options[i].value;
}
}
if (selectedCountry == 1)
{
stateArray = UnitedStates;
populateDropdown(stateArray);
}
if (selectedCountry == 2)
{
stateArray = UnitedKingdom;
populateDropdown(stateArray);
}
}
counter = 0;
function ff()
{
counter++;
var box = document.getElementById("details"+counter);
var cselectBox = document.createElement("Select");
cselectBox.name="countrySelect";
cselectBox.onchange = function()
{
updateDropdown();
}
var option1 = document.createElement("OPTION");
option1.text="United States";
option1.value=1;
cselectBox.options.add(option1);
var option2 = document.createElement("OPTION");
option2.text="United Kingdom";
option2.value=2;
cselectBox.options.add(option2);
document.getElementById("details"+counter).innerHTML+="</p><p>"+counter+". Candidate Country";
box.appendChild(cselectBox);
var box2 = document.getElementById("detailsx"+counter);
var ccselectBox = document.createElement("Select");
ccselectBox.name="stateSelect";
document.getElementById("detailsx"+counter).innerHTML+="</p><p>"+counter+". Candidate City";
box2.appendChild(ccselectBox);
}
</script>
</head>
<body>
<form name="myForm" >
<input type="button" value="Add Candidate" onClick="ff(); populateDropdown(UnitedStates);"">
<!--- Note: 6 Candidates will be the maximum. -->
<div id="details1"><b></b></div>
<div id="detailsx1"><b></b></div>
<div id="details2"><b></b></div>
<div id="detailsx2"><b></b></div>
<div id="details3"><b></b></div>
<div id="detailsx3"><b></b></div>
<div id="details4"><b></b></div>
<div id="detailsx4"><b></b></div>
<div id="details5"><b></b></div>
<div id="detailsx5"><b></b></div>
<div id="details6"><b></b></div>
<div id="detailsx6"><b></b></div>
</form>
</body>
</html>