Javascript Number.toFixed() Method 

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html>
<head>
	<title>Javascript .toFixed() Example</title>
</head>
<body>
 
	<script type="text/javascript">
 
		// Create a string representation of the number
		// that we want to format.
		var StringValue = "1234.56789";
 
		// Create a numeric representation of the number
		// that we want to format by parsing the float
		// value out of the string value.
		var NumericValue = parseFloat( StringValue );
 
 
		// The .toFixed() is a method of the Numeric object.
		// But, let's try to call it on the string to see if
		// there is any implicit type-casting done for us.
		try {
 
			document.write(
				StringValue.toFixed( 2 )
				);
 
		} catch( Error ){
 
			document.write(
				"String value did not work<br />"
				);
 
		}
 
 
		// We know that it works on the numeric object,
		// but let's loop over it to see how it works before
		// and after we pass the known number of digits.
		for (intI = 0 ; intI < 10 ; intI++){
 
			document.write(
				NumericValue.toFixed( intI ) + "<br />"
				);
 
		}
 
	</script>
 
</body>
</html>

For Cut-and-Paste