Fibonacci series in a range

FIBONACCI SERIES  IN A RANGE USING JAVASCRIPT


  Fibonacci series using JavaScript


<html>
<body>
<script type="text/javascript">
var a=0;
var b=prompt("enter the beginnig range");
var start=parseInt(b);
var c=0;
var inputNumber=prompt("Please enter fibonacci range number");
var con =parseInt(inputNumber);
document.write("Fibonacci");
if(con!=undefined && !isNaN(con)){
document.write("<br/>".start);
while (start<=con)
{
if(c!=undefined)
document.write(c);
document.write("<br/>");
c=a+start;
a=start;
start=c;
}
}
</script>
</body>
</html>