Untitled

<html>
        <head>
                <title>Test</title>
        </head>
        <body >
                <! Age Calculator Start-->

                <h2>Age Calculator</h2>
                <label for="birthyear">Birth Year</lable>
                <input type="text" id="birthyear"><br><br>
                <label for="Year">Current Year</lable>
                <input type="text" id="curryear" onFocus="curyear()">
                <h4>Your Age is </h4><h3 id="result"></h3>
                <input type="button" id="calculate" value="Calculate" onClick="Agecalculate()">

                <! Age Calculator End-->

                <! Supply Calculator Start-->

                <h2>Supply Calculator</h2>
                <label for="snack">Enter Your Fav Snack</lable>
                <input type="text" id="snack"><br><br>
                <label for="age">Age</lable>
                <input type="text" id="age"><br><br>
                <label for="amt">Amount Per Day</lable>
                <input type="text" id="amt">
                <h4>Your Estimated Comsumption by your favourite</h4><h4 id="SnackName"></h4><h4> is </h4><h3 id="SnackResult"></h3>
                <input type="button" id="Supcalculate" value="Calculate" onClick="Supcalculate()">

                <! Supply Calculator End-->

                <! Circle Properties Calculator Start-->

                <h2>Circle Properties Calculator</h2>
                <label for="cir">Enter the Radius</lable>
                <input type="text" id="rad"><br><br>
                <h2>Circumference</h2>
                <h4>Circumference is </h4><h3 id="Circum"></h3>
                <h2>Area</h2>
                <h4>Area is </h4><h3 id="Area"></h3>
                <input type="button" id="Circlecalculate" value="Calculate" onClick="Circle()">

                <! Circle Properties Calculator End-->

                <! Temperature Calculator Start-->

                <h2>Temperature Calculator</h2>
                <h1> F - C </h1>
                <label for="temp">Farenheit</lable>
                <input type="text" id="far" onchange="TempFC()"><br><br>
                <label for="temp">Celcius</lable>
                <input type="text" id="cel"><br><br>
                <br>
                <h1> C - F </h1>
                <label for="temp">Celcius</lable>
                <input type="text" id="cel1" onchange="TempCF()"><br><br>
                <label for="temp">Farenheit</lable>
                <input type="text" id="far1"><br><br>

                <! Temperature Calculator End-->

        </body>
        <script language="javascript" type="text/javascript">

        /* Age Calculator Script Start */

        function Agecalculate()
        {
        var a,b,c;
        a=document.getElementById('birthyear').value;
        b=document.getElementById('curryear').value;
        c=b-a;
        document.getElementById('result').innerHTML=c;
        }

        function curyear()
        {
        var d= new Date();
        var y= d.getFullYear();
        document.getElementById("curryear").value=y;
        }

        /* Age Calculator Script End */

        /* Supply Calculator Script Start */

        function Supcalculate()
        {
        var a,b,c,name,n;
        name=document.getElementById('snack').value;
        a=document.getElementById('age').value;
        b=document.getElementById('amt').value;
        n=2080-a;
        c=365*n*b;
        document.getElementById('SnackName').innerHTML=name;
        document.getElementById('SnackResult').innerHTML="Rs."+c;

        }

        /* Supply Calculator Script End */

        /* Circle Properties Calculator Script Start */

        function Circle()
        {
        var r,b,c;
        r=document.getElementById('rad').value;
        b=3.14*r*r;
        c=2*3.14*r;
        document.getElementById('Circum').innerHTML=b;
        document.getElementById('Area').innerHTML=c;
        }

        /* Circle Properties Calculator Script End */

        /* Temperature Calculator Script Start */

        function TempFC()
        {
        var a,b;
        a=document.getElementById('far').value;
        b=(((a-32)*5)/9);
        document.getElementById('cel').value=b;
        }

        function TempCF()
        {
        var d,e;
        d=document.getElementById('cel1').value;
        e=(((d*9)/5)+32);
        document.getElementById('far1').value=e;
        }

        /* Temperature Calculator Script End */

        </script>
</html>