我将尝试通过Ajax来填充一个 <select>
元素。在Firefox浏览器中,一切都很好,但在IE浏览器中却出现了一个 未知的运行时错误
。
HTML:
<select id="emp_select" name="emp_select">
<option value=" ">Please enter a store</option>
</select>
Javascript:
$("#store").blur(function() {
populateDropdowns();
});
...
function populateDropdowns() {
var store = $("#store").val();
if (store.length != 4) {
alert("Store # must be 4 digits!");
$("#store").focus();
return false;
}
var xhrJSON = new XMLHttpRequest();
var xhrEmpSelect = new XMLHttpRequest();
var xhrMgrSelect = new XMLHttpRequest();
var jsonDone = false;
var empSelectDone = false;
var mgrSelectDone = false;
$("#processing-dialog").dialog({
width: 300,
height: 150
});
xhrJSON.onreadystatechange = function() {
if (xhrJSON.readyState == 4) {
if (xhrJSON.status == 200) {
var js = document.createElement('script');
js.type = 'text/javascript';
js.innerHTML = xhrJSON.responseText;
var scr = document.getElementsByTagName('script')[1];
scr.parentNode.insertBefore(js,scr);
jsonDone = true;
if (jsonDone && empSelectDone && mgrSelectDone) {
$("#processing-dialog").dialog("close");
$("#processing-dialog").dialog("destroy");
return true;
}
} else {
return false;
}
}
}
xhrEmpSelect.onreadystatechange = function() {
if (xhrEmpSelect.readyState == 4) {
if (xhrEmpSelect.status == 200) {
$("#emp_select").html(xhrEmpSelect.responseText);
empSelectDone = true;
if (jsonDone && empSelectDone && mgrSelectDone) {
$("#processing-dialog").dialog("close");
$("#processing-dialog").dialog("destroy");
return true;
}
} else {
return false;
}
}
}
xhrMgrSelect.onreadystatechange = function() {
if (xhrMgrSelect.readyState == 4) {
if (xhrMgrSelect.status == 200) {
$("#mgr_select").html(xhrMgrSelect.responseText);
mgrSelectDone = true;
if (jsonDone && empSelectDone && mgrSelectDone) {
$("#processing-dialog").dialog("close");
$("#processing-dialog").dialog("destroy");
return true;
}
} else {
return false;
}
}
}
var url = "ajax.cgi";
var JSONdata = "action=generateJSON&store=" + store;
var EmpSelectData = "action=generateEmpSelect&store=" + store;
var MgrSelectData = "action=generateMgrSelect&store=" + store;
xhrJSON.open("POST",url);
xhrJSON.setRequestHeader("Content-Type","application/x-www-form-urlencoded");
xhrJSON.send(JSONdata);
xhrEmpSelect.open("POST",url);
xhrEmpSelect.setRequestHeader("Content-Type","application/x-www-form-urlencoded");
xhrEmpSelect.send(EmpSelectData);
xhrMgrSelect.open("POST",url);
xhrMgrSelect.setRequestHeader("Content-Type","application/x-www-form-urlencoded");
xhrMgrSelect.send(MgrSelectData);
}
blur
处理程序调用一个函数来填充(所有)不同的选择元素,再加上一个 JavaScript 对象,它保存一个关联数组,将姓名与员工 ID 匹配起来,这些 ID 作为两个 select
元素中选项的值返回。XHR 文本返回(对于 xhrJSON,content-type=application/json):
var empArray = new Array({ id:"12345678", title:"The Title", code:"C123", name:"John Doe"},...);
XHR Text返回结果(xhrEmpSelect, 内容类型=text/html):
<option value=" ">Select One</option>
<option value="John Doe">John Doe</option>
<option value="Joe Blow">Joe Blow</option>
...
<option value="other">Other...</option>
</select>
xhrMgrSelect返回类似的文本,content-type为text/html。
在Firefox中一切都很好,JS对象跨越并插入到DOM中,两个
<select>
标签的innerHTML。问题中展示了一个在<script>
标签上的innerHTML。你可能是想在标题中使用<script>
标签? - user1106925