get value of selected index of combo box in javascript - Stack Overflow

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i am trying to get the value of the selected index in my javascript

here i am defining my list box

<select name="bo" id="bo"  OnBlur="retrieveData(this.form)" ></select>

here i am trying to get the value (inside the form)

    alert(formbo.value); // NOT working
    alert(formbo.selectedIndex)  // working
    alert(formbo.selectedIndex.value)  // NOT working

but its showing "undefined"

i am trying to get the value of the selected index in my javascript

here i am defining my list box

<select name="bo" id="bo"  OnBlur="retrieveData(this.form)" ></select>

here i am trying to get the value (inside the form)

    alert(form.bo.value); // NOT working
    alert(form.bo.selectedIndex)  // working
    alert(form.bo.selectedIndex.value)  // NOT working

but its showing "undefined"

• javascript

Share Improve this question Follow asked Nov 11, 2011 at 19:15 junaidpjunaidp 11.2k3030 gold badges9090 silver badges144144 bronze badges 1

• Show your retrieveData function. – Rob W Commented Nov 11, 2011 at 19:16

Add a ment  | 

2 Answers 2

Sorted by: Reset to default 5

form.bo.options[form.bo.selectedIndex].value;

try this: in your html:

<select name="bo" id="bo" OnBlur="getComboVal(this)" ></select>

in javascript:

function getComboVal(sel)
{
    alert (sel.options[sel.selectedIndex].value);
}

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