Simple Javascript Format and validation questions

[Leo Smith]

I need to verify that someone has input a number (any numeric value), and then format the output. What is the simplest way to convert a text value in JavaScript to a numeric, int, or float? Next question is then how can I ensure specific format like #,###.00? Also, where is the best location for JavaScript Classes like String, Boolean, Int...?

Thanks for any help,
Leo

[epots9]

int:
[CODE=javasscrip t]var num = parseInt("43")[/CODE]
float:
[CODE=javasscrip t]var num = parseFloat("4.5 ")[/CODE]

depending on what your doing (ie. if your working with money, then u would want float).

**if the value doesn't/can't be parsed it will returns: NaN (Not a Number), so u'll have to check for that.

[Leo Smith]

This is great. How about formatting the output later, like ensuring that there are decimal places for currency, or commas between thousands and hundreds?

Thanks again,
Leo

[epots9]

this should do the trick:

[CODE=javascript]
<!-- Original: Cyanide_7 (leo7278@hotmai l.com) -->
<!-- Web Site: http://www7.ewebcity.c om/cyanide7 -->

<!-- This script and many more are available free online at -->
<!-- The JavaScript Source!! http://javascript.inte rnet.com -->

<!-- Begin
function formatCurrency( num) {
num = num.toString(). replace(/\$|\,/g,'');
if(isNaN(num))
num = "0";
sign = (num == (num = Math.abs(num))) ;
num = Math.floor(num* 100+0.500000000 01);
cents = num%100;
num = Math.floor(num/100).toString() ;
if(cents<10)
cents = "0" + cents;
for (var i = 0; i < Math.floor((num .length-(1+i))/3); i++)
num = num.substring(0 ,num.length-(4*i+3))+','+
num.substring(n um.length-(4*i+3));
return (((sign)?'':'-') + '$' + num + '.' + cents);
}
// End -->
[/CODE]

[Leo Smith]

Thanks, this will help alot.