Skip welcome & menu and move to editor
Welcome to JS Bin
File
Add library
Share
Login or Register
Blog
Help
Load cached copy from
  • Run with JS
  • Save
  • Share
  • …
 
<!DOCTYPE html>
<html>
<head>
  <meta charset="utf-8">
  <title>JS Bin</title>
</head>
<body>
    <select id = "foo" onchange = "limite(this.value, '#bar')">
        <option value = "1">1</option>
        <option value = "2">2</option>
        <option value = "3">3</option>
        <option value = "4">4</option>
        <option value = "5">5</option>
        <option value = "6">6</option>
        <option value = "7">7</option>
        <option value = "8">8</option>
    </select>
    
    <select id = "bar" onchange = "limite(this.value, '#foo')">
        <option value = "1">1</option>
        <option value = "2">2</option>
        <option value = "3">3</option>
        <option value = "4">4</option>
        <option value = "5">5</option>
        <option value = "6">6</option>
        <option value = "7">7</option>
        <option value = "8">8</option>
    </select>
</body>
</html>
 
function limite(valor, id){
    var otro = document.querySelector(id),
        actual = otro.value;
    
    otro.innerHTML = "";
    for (var i = 0, l = 8 - valor, opc; i < l; i++){
        opc = document.createElement("option");
        opc.value = i + 1;
        opc.text = i + 1;
        otro.add(opc);
    }
    
    if (actual <= otro.options.length){
        for (var j = 0, m = otro.options.length; j < m; j++){
            if (otro.options[j].value == actual){
                otro.options[j].selected = true;
                break;
            }
        }
    }
}
Output

This bin was created anonymously and its free preview time has expired (learn why). — Get a free unrestricted account

Dismiss x
public
Bin info
anonymouspro
0viewers