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Selecting item from a dropdown with javascript

Here is a dropdown menu of a website
<select name="ctl00$ddlWersjeJezykowe" onchange="javascript:setTimeout('__doPostBack(\'ctl00$ddlWersjeJezykowe\',\'\')', 0)" id="ddlWersjeJezykowe" style="width:100px;margin-right: 10px;">
<option selected="selected" value="1">Polska</option>
<option value="2">English</option>
<option value="17">Русская</option>
<option value="19">Українська</option>
<option value="20">Deutsch</option>
<option value="21">Français</option>
<option value="22">Español</option>
<option value="24">Português</option>
<option value="25">Türk</option>
</select>
I want to change the language to English through browser console. I tried this on my console
document.getElementById("ddlWersjeJezykowe").value="2";
It only selects English but doesn't change the language. How can i change the language to English through my browser console?

Changing the value programmatically doesn't fire the onchange event, so you have to call setTimeout('__doPostBack(\'ctl00$ddlWersjeJezykowe\',\'\')', 0) too.
Alternatively, you can call document.getElementById("ddlWersjeJezykowe").onchange()

This is will get the selected value from select dropdown
<select id="language" style="width:100px;margin-right: 10px;">
<option selected="selected" value="1">Polska</option>
<option value="2">English</option>
<option value="17">Русская</option>
<option value="19">Українська</option>
<option value="20">Deutsch</option>
<option value="21">Français</option>
<option value="22">Español</option>
<option value="24">Português</option>
<option value="25">Türk</option>
</select>
function GetValue() {
var e = document.getElementById("language");
var result = e.options[e.selectedIndex].value;
document.getElementById("result").innerHTML = result;
}
<button type="button" onclick="GetValue()">Get Selected Value</button>
<div id="result"></div>

Jquery change multiple select buttons with a select button

I want to change multiple select buttons's values with another select button.
Practically when someone select an option in the main select button, the other select buttons must change with that value.
EDIT: I added the code, the first is the main select button and after I select somethig there, it should change in the others.
<select class="select_format">
<option value="0.49">9x13</option>
<option value="0.59">10X15</option>
<option value="0.99">13X18</option>
<option value="1.20">15X21</option>
<option value="2.60">20X30</option>
</select>
<select name="format[]" class="format_imgs">
<option value="0.49">9x13</option>
<option value="0.59">10X15</option>
<option value="0.99">13X18</option>
<option value="1.20">15X21</option>
<option value="2.60">20X30</option>
</select>
<select name="format[]" class="format_imgs">
<option value="0.49">9x13</option>
<option value="0.59">10X15</option>
<option value="0.99">13X18</option>
<option value="1.20">15X21</option>
<option value="2.60">20X30</option>
</select>
<select name="format[]" class="format_imgs">
<option value="0.49">9x13</option>
<option value="0.59">10X15</option>
<option value="0.99">13X18</option>
<option value="1.20">15X21</option>
<option value="2.60">20X30</option>
</select>
Thanks.

Since you didn't supply code here's a guess:
$(".myTriggerButton").on("click", function() {
$(".buttonToChangeValue").each(function() {
this.value = "new value";
});
});

$('.select_format').change(function(){
$('.format_imgs').val( $(this).val() );
});
https://jsfiddle.net/7hno0ob8/1/

How can I move a select element's values & text to another select element

I want to get the <option> values and text from a <select> element #myselect, and add it to another <select> element #newselect. The value and text passed to the second select element, #newselect, must also be disabled. I'd like support for IE 8+.
<select id="myselect">
<option value="1">Red</option>
<option value="2">Orange</option>
<option value="3">Yellow</option>
</select>
Take the above, disable them and add them to the below:
<select id="newselect">
<option value="1">Green</option>
<option value="2">Blue</option>
<option disabled value="1">Red</option>
<option disabled value="2">Orange</option>
<option disabled value="3">Yellow</option>
</select>

Since you included the jQuery tag, here's a jQuery solution.
As long as you're using jQuery 1.x, IE8 support is included.
$('#myselect option').each(
function() {
$(this).prop('disabled', true).appendTo('#newselect');
}
);
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"></script>
<select id="myselect">
<option value="1">Red</option>
<option value="2">Orange</option>
<option value="3">Yellow</option>
</select>
<select id="newselect">
<option value="1">Green</option>
<option value="2">Blue</option>
</select>

You already have jQuery answer. So now if you are curious how it can be in pure javascript, here it is. As you can see, it's a little more verbose of course:
var mySelect = document.getElementById('myselect'),
newSelect = document.getElementById('newselect');
while (mySelect.options.length) {
mySelect.options[0].disabled = true;
newSelect.add(mySelect.options[0]);
}
<select id="myselect">
<option value="1">Red</option>
<option value="2">Orange</option>
<option value="3">Yellow</option>
</select>
<select id="newselect">
<option value="1">Green</option>
<option value="2">Blue</option>
</select>

Links in <select> dropdown options

Is it possible for each dropdown options to link somewhere when selected without the need for an external button?
<select>
<option value="x">x</option>
<option value="y">y</option>
</select>

You can use the onChange property. Something like:
<select onChange="window.location.href=this.value">
<option value="www.google.com">A</option>
<option value="www.aol.com">B</option>
</select>

Add an onchange event handler and set the pages location to the value
<select id="foo">
<option value="">Pick a site</option>
<option value="http://www.google.com">x</option>
<option value="http://www.yahoo.com">y</option>
</select>
<script>
document.getElementById("foo").onchange = function() {
if (this.selectedIndex!==0) {
window.location.href = this.value;
}
};
</script>

... or if you want / need to keep your option 'value' as it was, just add a new attribute:
<select id="my_selection">
<option value="x" href="/link/to/somewhere">value 1</option>
<option value="y" href="/link/to/somewhere/else">value 2</option>
</select>
<script>
document.getElementById('my_selection').onchange = function() {
window.location.href = this.children[this.selectedIndex].getAttribute('href');
}
</script>

Maybe this will help:
<select onchange="location = this.value;">
<option value="home.html">Home</option>
<option value="contact.html">Contact</option>
<option value="about.html">About</option>
</select>

This is an old question, I know but for 2019 peeps:
Like above if you just want to change the URL you can do this:
<select onChange="window.location.href=this.value">
<option value="www.google.com">A</option>
<option value="www.aol.com">B</option>
</select>
But if you want it to act like an a tag and so you can do "./page", "#bottom" or "?a=567" use window.location.replace()
<select onChange="window.location.redirect(this.value)">
<option value="..">back</option>
<option value="./list">list</option>
<option value="#bottom">bottom</option>
</select>

Extending on #kevin's answer,
if someone has to perform some confirmation logic if URL is critical.
<select onChange=" this.options[this.selectedIndex].text == 'Delete' ? "Confirmation logic" : window.location.href=this.value;" >
<option selected disabled>Action</option>
<option value="/user/view">View</option>
<option value="/user/edit">Edit</option>
<option value="/user/delete">Delete</option>
</select>

You can use this code:
<select id="menu" name="links" size="1" onchange="window.location.href=this.value;">
<option value="URL">Book</option>
<option value="URL">Pen</option>
<option value="URL">Read</option>
<option value="URL">Apple</option>
</select>

jquery disable item options if a certain value is selected

I'm stuck with a jquery problem .. I actually want to disable all the (from all other items except the parent one) if the selected value is "interestingValue"
<select name="menufoo" id="menufoo" class="menufooClass">
<option value="interestingValue">bar foo</option>
<option value="foo1">foo abc1</option>
<option value="bar1">foo abc1</option>
</select>
<select name="menufoo2" id="menufoo2" class="menufooClass2">
<option value="interestingValue2">bar foo2</option>
<option value="foo2">foo abc2</option>
<option value="bar2">foo abc2</option>
</select>
ex : if we select "interestingValue" from the first menu we get
<select name="menufoo" id="menufoo" class="menufooClass">
<option value="interestingValue">bar foo</option>
<option value="foo1">foo abc1</option>
<option value="bar1">foo abc1</option>
</select>
<select name="menufoo2" id="menufoo2" class="menufooClass2">
<option value="interestingValue2" disabled="disabled">bar foo2</option>
<option value="foo2" disabled="disabled">foo abc2</option>
<option value="bar2" disabled="disabled">foo abc2</option>
</select>
ex : if we select "interestingValue2" from the second menu we get
<select name="menufoo" id="menufoo" class="menufooClass">
<option value="interestingValue" disabled="disabled">bar foo</option>
<option value="foo1" disabled="disabled">foo abc1</option>
<option value="bar1" disabled="disabled">foo abc1</option>
</select>
<select name="menufoo2" id="menufoo2" class="menufooClass2">
<option value="interestingValue2">bar foo2</option>
<option value="foo2">foo abc2</option>
<option value="bar2">foo abc2</option>
</select>
thanks :)

If your select tags are siblings you can try:
$('select').change(function(){
if (this.selectedIndex == 0) {
$(this).siblings('select').find('option').prop('disabled', true)
}
})
DEMO

I'm not sure I get it, but something like this:
$('[id^=menufoo]').on('change', function() {
if (this.value.indexOf('interestingValue') != -1 ) {
$('[id^=menufoo]').not(this).find('option').prop('disabled', true);
}else{
$('[id^=menufoo]').find('option').prop('disabled', false);
}
});​
FIDDLE

You can attach an onchange event to both select items and check whether the new select value is equivalent to interestingValue for the first menu and interestingValue2 from the second menu. You can use .prop() to disable this.
You can do something like this:
$("#menufoo").bind("change", function(event){
$("#menufoo2").find("option").prop("disabled", ($(this).val() == "interestingValue"));
});
$("#menufoo2").bind("change", function(event){
$("#menufoo").find("option").prop("disabled", ($(this).val() == "interestingValue2"));
});

here you go
<script src="jquery.min.js"></script>
<script>
$(document).ready(function(){
$("#menufoo").change(function (){
if($("#menufoo option:selected").val()=="interestingValue")
$('.menufooClass2 option').attr('disabled','disabled');
});
$("#menufoo2").change(function (){
if($("#menufoo2 option:selected").val()=="interestingValue2")
$('.menufooClass option').attr('disabled','disabled');
});
});
</script>
<select name="menufoo" id="menufoo" class="menufooClass">
<option value="interestingValue">bar foo</option>
<option value="foo1">foo abc1</option>
<option value="bar1">foo abc1</option>
</select>
<select name="menufoo2" id="menufoo2" class="menufooClass2">
<option value="interestingValue2">bar foo2</option>
<option value="foo2">foo abc2</option>
<option value="bar2">foo abc2</option>
</select>