我有wriiten javascriot两个级别的下拉选择值，我在第二个下拉列表中得到值。现在发生了什么，数组中的值被分配到第二个下拉列表。我想将URL作为值分配到第二个下拉列表并将它们重定向到那些下拉列表。在我的下面示例中，如果我选择服装然后我得到男性和女性的第二次下拉菜单，所以如果我选择男性在第二次下拉列表中它应该去xyz.com ....所以对于第二个下拉列表中的每个选项，我希望将其重定向到特定的URL我该怎么办？
<html>
<head>
<script type="text/javascript">
var categories = [];categories["startList"] = ["Apparel","Books"]
categories["Apparel"] = ["Men","Women"];
categories["Books"] = ["Biography","Fiction","Nonfiction"];
var nLists = 2; // number of lists in the set
function fillSelect(currCat,currList){
var step = Number(currList.name.replace(/\D/g,""));
for (i=step; i<nLists+1; i++) {
document.forms[0]['List'+i].length = 1;
document.forms[0]['List'+i].selectedIndex = 0;
}
var nCat = categories[currCat];
//var nurl= url[currCat]
for (each in nCat) {
var nOption = document.createElement('option');
var nData = document.createTextNode(nCat[each]);
nOption.setAttribute('value',nCat[each]);
nOption.appendChild(nData);
currList.appendChild(nOption);
}
}
function getValue(isValue) {
alert(isValue);
}
function init() {
fillSelect('startList',document.forms[0]['List1'])
}
navigator.appName == "Microsoft Internet Explorer" ? attachEvent('onload', init, false) : addEventListener('load', init, false);
</script>
</head>
<body>
<form action="">
<select name='List1' onchange="fillSelect(this.value,this.form['List2'])">
<option selected>Make a selection</option>
</select>
<!--<select name='List2' onchange="fillSelect(this.value,this.form['List3'])">
<option selected>Make a selection</option>
</select>-->
<select name='List2' onchange="getValue(this.value)">
<option selected >Make a selection</option>
</select>
</form>
</body>
</html>
首先，您需要将源数组修改为JSON格式，如下所示：
var categories = [];categories["startList"] = [{"text":"Apparel","url":"Apparel"},{"text":"Books","url":"Books"}]
categories["Apparel"] = [{"text":"Men","url":"xyz.com"},{"text":"Women","url":"abc.com"}];
categories["Books"] = [{"text":"Biography","url":"Biography.com"},{"text":"Fiction","url":"Fiction.com"},{"text":"Nonfiction","url":"Nonfiction.com"}];
现在，在函数中我们可以将它用作键值对：
var nLists = 2; // number of lists in the set
function fillSelect(currCat,currList){
var step = Number(currList.name.replace(/\D/g,""));
for (i=step; i<nLists+1; i++) {
document.forms[0]['List'+i].length = 1;
document.forms[0]['List'+i].selectedIndex = 0;
}
var nCat = categories[currCat];
//var nurl= url[currCat]
for (each in nCat) {
var nOption = document.createElement('option');
var nData = document.createTextNode(nCat[each]["text"]);
nOption.setAttribute('value',nCat[each]["url"]);
nOption.appendChild(nData);
currList.appendChild(nOption);
}
}
function getValue(isValue) {
//alert(isValue);
location.replace("http://" + isValue);
}
而已 ！！！