Roll Dice Using JavaScript

<!DOCTYPE html>

<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <title></title>
    <style type="text/css">
        #die1,#die2 {

            width:52px;
            height:47px;
            border:2px solid;
            border-color:gray;
            background-color:lightgray;
            float:left;
            margin:3px;

        }
        button{

            width:70px;
            padding-top:76px;
            padding-left:42px;
            float:left;
        }

    </style>
</head>
<body>

    <div id="die1">0</div>
        <div id="die2">0</div>
   <br />
        <input type="button"  value="Player1" id="us1"   onclick="rollDice(true);"/>
        <input type="button"  value="Player2" id="us2"  onclick="rollDice(false);"/>
    <p id="p1"></p>
    <p id="p2"></p>


    <h2 id="status"></h2>
<script type="text/javascript">

    var temp1val = 0;
    var temp2val = 0;
    onlo(false);
    function onlo(val)
    {
        //debugger;
        var us1 = document.getElementById('us1');
        var us2 = document.getElementById('us2');
        if (val == true)
            {
            us2.disabled = false;
            us1.disabled = true;
        }
        else {
            us2.disabled = true;
            us1.disabled = false;

        }
    }

    function rollDice(chkresult)
    {
        onlo(chkresult);
    var die1 = document.getElementById('die1');
    var die2 = document.getElementById('die2');
    var status = document.getElementById('status');
    var d1 = Math.floor(Math.random() * 6)+1;
    var d2 = Math.floor(Math.random() * 6)+1;
    if (chkresult)
    {
        temp1val += d1 + d2;
    }
    else
    {
        temp2val +=d1 + d2;
    }
    die1.innerHTML = d1;
    die2.innerHTML = d2;
    document.getElementById('p1').innerHTML = 'Player1= ' + temp1val;
    document.getElementById('p2').innerHTML = 'Player2= ' + temp2val;

    if (temp1val >= 50) {
        alert("Player1 is d winner")
        die1.innerHTML = 0;
        die2.innerHTML = 0;

        temp1val = 0;
        temp2val = 0;
    }
   else if (temp2val >= 50) {
        alert("Player2 is d winner")
        die1.innerHTML = 0;
        die2.innerHTML = 0;

        temp1val = 0;
        temp2val = 0;
    }

   else if(d1==d2)
    {
        status.innerHTML = "U got draw try 1 more time";
        onlo(!chkresult);
    }
    else
    {
        status.innerHTML = "";
   }

    }
</script>
</body>
</html>