How to find if argument is numeric or not, using Javascript
Use the code below:
// checks to see whether the input is a numeric string or not also includes "." and "-"
function IsNumeric(strString)
{
var strValidChars = "0123456789.-"; // valid characters for a numeric string
var strChar;
var result = true;
var i = 0
if (strString.length == 0) return false;
// check to see if strString consists of valid characters listed in strValidChars
while (i < strString.length && result == true)
{
strChar = strString.charAt(i);
if (strValidChars.indexOf(strChar) == -1) return false;
i++;
}
return result;
}
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Please feel free to use the comments form below if you have any questions or need more explanation on anything. I recommend thoroughy testing on a production-like test system first before moving to production.
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