how to submit combo box value with out form using javascript?

I need to submit combo box value with out form. When I click on any value of combo that suppose to submit automatically using javascript. I am using PHP in backend.

<select name="select" id="select" style="width:50px;">
  <option value="25">25</option>
  <option value="50">50</option&g开发者_开发技巧t;
  <option value="100">100</option>
  <option value="All">All</option>
</select>

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Here a js part:

function getinfo() {
  var aList = document.getElementById("select");
  var val = aList.options[aList.selectedIndex].value;

  // document.write("<p>Here what you select: "+val+"</p>");
  // here you can send `val` to the server using... are you using any js library?
}

And you need to change your select declaration:

<select name="select" id="select" style="width:50px;" onchange="getinfo()">
                                                      --------------------
</select>

OK, how to send val to the server is another question... If you are using jQuery - you can use jQuery.ajax(...) or any helper like jQuery.get(...). If you are vanilla-js user you can use XMLHttpRequest way and if you use any other lib - just check this lib's documentation to get helped about sending data to the server.

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You can use the methods below.

1) Use Session or Cookie to send external data

2) Send a POST request using XMLHttpRequest in javascript.Checkout the link here.

3)You can use cURL function to send HTTP POST request. Please go through the link here.

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Some comments:

• The select element should always be inside a form. But you don't need to expose the form on the page--you do not need to include a submit input element.

• You can use Javascript (JS) to submit the form after the user has changed the value of the select.

• Or you can use JS with Ajax to submit the form asynchronously in the background--the user will not be aware that the data had been submitted and the page will not reload or "flash"

What would you like to do?