ISNAN

ISNAN

<script>
function get()
{
 var n,s;
    while(isNaN(n))
 {
 n = prompt("Enter any Num : ");
 if(isNaN(n))
   alert("Its not a number");
 else
  alert( square(n));
}
}
function square(n)
{
 return(n*n)
}
</script>
<body onload="get()">

<input onclick=get()>
<button id=b1 onclick=get()> Refresh
</button>

<body>

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