Thứ Ba, 20 tháng 3, 2018

Java script
Một ví dụ nho nhỏ


vi du

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1" />
<title>Java script</title>
<style>
input[type=text]
{
    width:50px;
    text-align:center;
    border:thin solid gray;
    padding: 2px 5px 2px 5px;
    border-radius: 3px 3px 3px 3px;
}
#result
{
    width:60px;
    background:#33CC66;
    color: #FFFFFF;
    font-weight:bold;
}
</style>
<script>
    function show()
    {
        var f = document.getElementById("f");
        var s = document.getElementById("s");
        var r = document.getElementById("result");
         
        r.value =  new Number(f.value) + new Number(s.value);      
    }
</script>
</head>
<body>
<input type="text" id="f" onkeyup="show();"/>+<input type="text" id="s" onkeyup="show();"/>
<input type="text" id="result" readonly="true" />
</body>
</html>