Finding the maximum and minimum number

Finding the maximum and minimum number : max : Math JAVASCRIPT TUTORIALS

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Finding the maximum and minimum number



<html>
<head>
<title>Finding the maximum and minimum number</title>
<script type="text/javascript" language="javascript">
<!-- //
function SetFocus(){
    document.SimpleForm.FirstInput.focus();
}

function FindMaxAndMin(){
    var num1 = document.SimpleForm.FirstInput.value;
    var num2 = document.SimpleForm.SecondInput.value;
    var num3 = document.SimpleForm.ThirdInput.value;

    if (isNaN(num1) || isNaN(num2) || isNaN(num3)){
        alert("You made an invalid entry. Please start again.");
        document.SimpleForm.reset();
        SetFocus();
    } else {
        var MaxNum = Math.max(num1,num2,num3);
        var MinNum = Math.min(num1,num2,num3);
        var alertString = "You entered " + num1 + ", " + num2 + " and " +num3;
        alertString += "nThe largest number is " + MaxNum;
        alertString += "nThe smallest number is " + MinNum;
        document.write(alertString);
        document.SimpleForm.reset();
        SetFocus();
    }
}

// -->
</script>
</head>
<body onload="SetFocus()">
<form name="SimpleForm">
<table>
<tr>
 <td width="25%" align="right">Enter first number:</td>
 <td><input name="FirstInput" type="text"></td>
</tr>
<tr>
 <td width="25%" align="right">Enter second number:</td>
 <td><input name="SecondInput" type="text"></td>
</tr>
<tr>
 <td width="25%" align="right">Enter third number:</td>
 <td><input name="ThirdInput" type="text"></td>
</tr>
<tr>
 <td width="25%" align="right">&nbsp;</td>
 <td><button type="Button" onclick="FindMaxAndMin()">
Click to calculate</button></td>
</tr>
</table>
</form>
</body>
</html>