Drop Down Dependencies

[sunziun]

Hello very one, I've this peace of code which I cannot make it work. please some one help me with this

<script type="text/javascript"> function disDropDown(){if(document.getElementById("one").value === "yes"){document.getElementById("two").disable='true'} else{document.getElementById("two").disable='false'}}</script> <form><select id="one"><option value="yes">Yes</option><option value="no">No</option></select> <select id="two"><option value="1">1</option><option value="2">2</option></select></form>

[justsomeguy]

Where are you calling that function? With select elements you typically use the selectedIndex property and the options property to get the value, instead of the value property. And I believe the property to disable something is called "disabled". http://www.w3schools.com/jsref/dom_obj_select.asp

[sunziun]

I would like disable the whole drop down called "one" by using onChange() <select id="one" onChange="disDropDown()"><option value="yes">Yes</option><option value="no">No</option></select> I would like to use the value, not value property!

Edited June 28, 2012 by sunziun

[justsomeguy]

The select element has a property called options which is an array of the options they can select, and it has a property called selectedIndex which is the index of the selected option in the options array. That option has a value property that you can use to get the value of the selected option.

[sunziun]

I am sorry but I don't get you. can you give examples?

[justsomeguy]

select.options[select.selectedIndex].value

[sunziun]

Sorry but I don't how to use this. please give me comprehensible example. thanks anyways.

[justsomeguy]

http://www.google.com/search?client=opera&rls=en&q=javascript+select+element+get+selected+value&sourceid=opera&ie=utf-8&oe=utf-8&channel=suggest