JavaScript Programming
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A Generic Number-Formatting Routine
A Generic Number-Formatting Routine
<HTML>
<HEAD>
<TITLE>Number Formatting - Happy Codings :-) JavaScript Code Examples</TITLE>
<SCRIPT LANGUAGE="JavaScript">
// generic positive number decimal formatting function
function format (expr, decplaces) {
var str = "" + Math.round (eval(expr) * Math.pow(10,decplaces))
while (str.length <= decplaces) {
str = "0" + str
}
var decpoint = str.length - decplaces
return str.substring(0,decpoint) + "." + str.substring(decpoint,str.length);
}
function dollarize (expr) {
return "$" + format(expr,2)
}
</SCRIPT>
</HEAD>
<BODY>
<H1>Make Money - Happy Codings :-) JavaScript Code Examples</H1>
<FORM>
Enter a positive floating-point value or arithmetic expression to be converted to a currency format:<P>
<INPUT TYPE="text" NAME="entry" VALUE="1/3">
<INPUT TYPE="button" VALUE="Dollars and Cents" onClick="this.form.result.value=dollarize(this.form.entry.value)">
<INPUT TYPE="text" NAME="result">
</FORM>
</BODY>
</HTML>
