javascript

Simple example of a base conversion code in javascript

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> 
<html xmlns="http://www.w3.org/1999/xhtml"> 
<head> 
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> 
<title>10 Into the system <-->2 Into the system </title> 
</head> 

<body> 
Decimal:  
    <input type="text" id="decimal" /> 
    <input type="button" value="to Binary" onclick="return toBinary();" /> <br /> 
Binary:  
    <input type="text" id="binary" /> 
    <input type="button" value="to Decimal" onclick="return toDecimal();" /> 

      
<script type="text/javascript"> 
var d = document.getElementById('decimal');  
var b = document.getElementById('binary');  

function toBinary() {  
    var num = d.value;  
    if (isNaN(num) || !num) {  
        d.value = "";  
        return false;  
    }  
    b.value = (parseInt(num)).toString(2);  
}  

function toDecimal() {  
    var num = b.value;  
    if (isNaN(num) || !num) {  
        b.value = "";  
        return false;  
    }  
    d.value = parseInt(num, 2);  
}  
</script> 
</body> 
</html>