我在我的pgae中有一個下拉列表。當我提醒兩個連續時間值的下拉選擇索引我得到兩個不同的值。這是我的代碼。JavaScript:獲取dropdownlist所選索引值的兩個不同值
$(document).ready(function() {
// here code for getting data from server to bind dropdown
DoAjaxCall("?method=getDataForDDL&callbackmethod=BindDDL")
// after binding data to dropdown I wrote following two alert
alert(document.getElementById("ddlState").selectedIndex); //this alert -1
alert(document.getElementById("ddlState").selectedIndex); // this alert 0
alert(document.getElementById("ddlState").selectedIndex); // this alert 0
}
function BindDDL(data, msg) {// this function is called automatically after successfull AJAX call
var tbldata = eval('(' + data.toString() + ')'); //convert JSON data to Javascript Object
var ddl = document.getElementById("ddlState");
for (var i = 0; i < tbldata.Table.length; i++) {
ddl.options[ddl.length] = new Option(tbldata.Table[i][1], tbldata.Table[i][0]);
}
}
function DoAjaxCall(parameter){
//code for getting data from server by "POST" method
//After this function BindDDL is called which is call back function.
}
如果你不能得到我的問題,請告訴我。 –
無法複製:http://jsfiddle.net/xbZbA/1/我猜你的代碼有另一個問題,你沒有顯示。 – MikeSmithDev
@Anil請分享已評論的代碼。我嘗試了同樣的警告兩次,但我得到正確的答案。 – Susai