javascript - To get the text of the selected item in the dropdown list in java script - Stack Overflow

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I want to get the text of the selected item in the drop down list. I tried the following code

var e = document.getElementById("ddlTime.ClientID");  
var selectedTime = e.options[e.selectedIndex].text;

but it gives me "Unable to get value of the property 'options': object is null or undefined"

can any one please help me out with this ?

I want to get the text of the selected item in the drop down list. I tried the following code

var e = document.getElementById("ddlTime.ClientID");  
var selectedTime = e.options[e.selectedIndex].text;

but it gives me "Unable to get value of the property 'options': object is null or undefined"

can any one please help me out with this ?

• javascript
• asp

Share Improve this question Follow edited Mar 22, 2013 at 7:41 Habib 223k3030 gold badges418418 silver badges444444 bronze badges asked Mar 22, 2013 at 7:41 Nuthan GowdaNuthan Gowda 26533 gold badges66 silver badges2020 bronze badges

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3 Answers 3

Sorted by: Reset to default 3

You should do:

var e = document.getElementById("<%= ddlTime.ClientID%>");

Not:

var e = document.getElementById("ddlTime.ClientID"); 

My little sample jsfiddle

You have to specify <%= %>

var e = document.getElementById("<%= ddlTime.ClientID%>"); 

JavaScript

    function WeekChange() {
        var Week = window.document.getElementById("ddWeek").value;
        if (Week != "--Select--") {
            window.document.getElementById("txtDetect").value = "Every " + Week;
        }
        else {
            window.document.getElementById("txtDetect").value = " ";
        }
    }

<asp:DropDownList ID="ddWeek" runat="server" onchange="javascript:WeekChange();">

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