Help with Javascript - Numeric Entry Check

I bought Dreamweaver CS3 about 2 months ago. I HIGHLY recommend it. The Spry Validation does exactly what you want. You can make a huge form with validation like credit card, email, integer, required... in minutes. I'm sure you can download just the spry validation JS and CSS files somewhere and you'll have all you need for all types of validation.

Thank you for your response Dan,

I tried the code and got seveal errors...I have very limited knowledge of javascript i could not make it work... can you please resend a detailed code with the form etc? I am sorry that i am asking for spoon feeding...thank you in advance

JT

I had to do this once, and found things like NaN or parsefloat to be unreliable. So I wrote my own function.

function isFloat(theString) {
/*
returns true if the input string is a float
don't want to use parseFloat because for something like 12.2xs, parseFloat will return 12.2 which is not what we want
*/
var i = 0;
var theLength = theString.length;
var thisChar = "";
var usedDecimals = 0;
var isAFloat = true;

if (isAFloat == true) {
for (i=0; i < theLength; i++) {
thisChar = theString.substring(i, i + 1);
// only allowed one decimal point
if (thisChar == ".") {
usedDecimals++;
}

if (usedDecimals > 1) {
isAFloat = false;
}

if(isAFloat == true && thisChar != ".") {
if (thisChar == "1" || thisChar == "2" || thisChar == "3" || thisChar == "4" || thisChar == "5"
|| thisChar == "6" || thisChar == "7" || thisChar == "8" || thisChar == "9" || thisChar == "0" ){
var x = 1; // dummy statement for do nothhing
} // numeric
else {
isAFloat = false;
}
} // usedDecimals ok
} // looping through the string
} // isAFloat is true
return isAFloat;
} // function is float