Javascript run function on click

Question

Is there a way to execute a javascript function when the user clicks on a certain <option> within a <select> drop down menu?

Answer 1

<select> elements support the onchange event.

http://w3schools.com/jsref/event_onchange.asp

Answer 2

You HTML would look like this:

<select onchange="functionName(this.value)">
    <option value="1"> 1 </option>
    <option value="2"> 2 </option>
    <option value="3"> 3 </option>
</select>​

In your JavaScript, you would have a function ( ex: functionName() ) and you would use that function to test for each case.

Answer 3

Here:

elem.onclick = function ( e ) {
    if ( e.target.tagName.toLowerCase() === 'option' ) {
        // an <option> element was clicked
        // do your thing
    }
};

where elem is your SELECT element.

Live demo: http://jsfiddle.net/vBB7a/

Answer 4

You can use the change event to check which option the user clicked on and then execute your desired code.

In Jquery:

$('#yourSelect').change(function(){
    var item = $(this).val();

    if (item === "Specified Choice")
    {
        //do your stuff here
    }
});

Answer 5

You need to hook the onchange event of the <select> element, and check the value. Have you tried that?

Answer 6

Inside your <option> you could use the onclick event to specify a javascript function to be executed.

E.g.

<option onclick="yourFunction()">

Answer 7

Use Jquery in your Project..

HTML Code:

<select id="myselect">
    <option value="">Select</option>
    <option value="1">StactOverFlow</option>
    <option value="2">SuperUser</option>
    <option value="3">Another 1</option>
    <option value="4">Another 2</option>
    <option value="5">Another 3</option>
</select>

JQuery Code:

$("#myselect").bind('change', function(){
    switch($(this).val()){
        case "1":
            click_action_1();
            break;

        case "2":
            click_action_2();
            break;

        case "3":
            click_action_3();
            break;
    }
});

function click_action_1(){
    alert('Hi 1');
}         

function click_action_2(){
    alert('Hi 2');
}      

function click_action_3(){
    alert('Hi 3');
}
​

You can even execute a new javascript function with a <option> Watch in Action: http://jsfiddle.net/extremerose71/PnfCk/8/

Enjoy!...