How to create list of checkboxes

Question

How to create a list of checkbox and retrieve selected checkbox value in javascript

Answer 1

Presuming a structure like:

<form name="test">
  <input type="checkbox" name="colors" value="red"/>
  <input type="checkbox" name="colors" value="orange"/>
  <input type="checkbox" name="colors" value="yellow"/>
  <input type="checkbox" name="colors" value="blue"/>
</form>

Then use something like this to retrieve the value:

var values = [];
var cbs = document.forms['test'].elements['colors'];
for(var i=0,cbLen=cbs.length;i<cbLen;i++){
  if(cbs[i].checked){
    values.push(cbs[i].value);
  } 
}
alert('You selected: ' + values.join(', '));

Answer 2

To create an element in DOM, use document.createElement. To retrieve selected checkbox value, use element.checked and/or element.value. To learn more about HTML DOM, start here.

You may want to consider using jQuery to ease all the DOM manipulation and traversing work.