Untitled

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>MyFirstJavaScriptPage</title>
</head>

<body>

<script type="text/javascript">


    /*var x1="ahmed";
    var y1=24;
    alert("my name is "+x1+" and my age is "+y1);
    */
   //var xx=confirm("راحد اعدلج ... اوكي؟؟؟");
  /*  if(xx==true)
    {
        alert("welcome");
        var username=prompt("enter your name please");
        var password=prompt("enter your password please");
        if(username=="ahmed" && password=="3011")
        {alert("hey "+username);}
        else
        {alert("wrong");}

    }
    else
    {
        alert("get out");
    }
*/

    function sum() {
        var a=parseInt(document.getElementById('n1').value);
        var b=parseInt(document.getElementById('n2').value);
        document.getElementById('res').innerHTML=(a+b);
    }
    function mul() {
        var aa=parseInt(document.getElementById('n1').value);
        var bb=parseInt(document.getElementById('n2').value);
        var c=aa*bb;
        alert("the result is " + c);
    }
    for (var i=0;i<5;i++)
    {
       document.write("<li>"+i + "</li>")
    }

    function check_age() {
        try {
            var MyAge = parseInt(document.getElementById('age').value);
            if (MyAge < 18) {
                alert("you are not allowed to enter ");
            }
            else {
                alert("welcome ");
            }

            switch (MyAge) {
                case 0:
                    alert("get out from your mom");
                    break;
                case 18:
                    alert("you are lucky");
                    break;
            }
        }
        catch(error)
        {
            alert(error);
        }
        finally
        {
            alert("worked");
        }
    }

    var abc='{"name1":"ahmed","age1":"23","skills1":["html","css"]}';
    var abcJSON=JSON.parse(abc);
//    alert(abcJSON.name1 + " is "+abcJSON.age1 )
</script>
<p id="timer">

</p>
<input id="n1" placeholder="number1">
<input id="n2" placeholder="number2">               <br/>
<button type="button" onclick="sum()">          find sum     </button>
<button type="button" onclick="mul();">      multiply    </button>
<h1 id="res" >result</h1>                           <br/>
<input type="text" id="age">
<button type="button" onclick="check_age()" > check my age </button>


</body>

</html>