Replace a-z A-Z and special Characters

[wrighterb]

I want to replace everything except 0-9 . + -

Everything else gone. This is what I have so far, but its not taking out the a-zA-Z

What am I doing wrong?

function clearChar() {
document.adjustment.adjustAmount.value=filterNum(document.adjustment.adjustAmount.value)
function filterNum(str) {
re = /\$|[a-zA-Z]|,|@|#|~|`|\%|\*|\^|\&|\(|\)|\=|\[|\_|\]|\[|\}|\{|\;|\:|\'|\"|\<|\>|\?|\||\\|\!|\$|/g;
return str.replace(re, "");
}
}

 

[wrighterb]

Nevermind, it works... must have been cached or something.

 

[monksnake]

Why grab everything you want to get rid of when the list of what you want to keep is a lot smaller??

var re = /[^0-9.+-]/g

**Tested**

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[wrighterb]

Awesome thanks, less code the better, can I add a limit to the number of + - Signs like so?

function clearChar() {
document.adjustment.adjustAmount.value=filterNum(document.adjustment.adjustAmount.value)
function filterNum(str) {
re = /[^0-9.+{1}-{1}]/g
return str.replace(re, "");
}

 

[monksnake]

AFAIK not with the .replace() method.

I don't think it's possible to say replace ALL except one.

You can use the .test() method though to make the user rewrite the expression if there are more (or less) + or - signs than you want.



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