validate numeric

[ixnay5]

hi -

trying to simply validate a text box entry (fieldname: qty) on form submit. if it's not numeric, throw an alert. but of course it isn't working and i can't see why. it's throwing the alert whether the entry is valid or not.

here's the code: (ignore pcount and scount...they're always correctly filled by other means)

function isblank(s) {

	for(var i = 0; i < s.length; i++) {
		var c = s.charAt(i);
		if ((c != ' ') && (c != '\n') && (c != '')) return false;
		
	}

	return true;

}

function validate(f) {

	var msg1 = "Message!"
	var q = parseInt(f.qty.value);

	if ( (f.pcount.value == "") || (f.scount.value == "") || (isblank(q)) ||  (isNAN(q)) ){

		alert(msg1);
		return false;
	}
	
	return true;
}

 

[cLFlaVA]

Try this:

function validate() {
    if (isNaN(document.frmpage.start_date.value)) {
        alert("Not a number!");
    } else {
        alert("Is a number!");
    }
}

HTH

*cLFlaVA
----------------------------
A polar bear walks into a bar and says, "Can I have a ... beer?"
The bartender asks, "What's with the big pause?

 

[ixnay5]

well for one thing, "(isblank(q))" makes no sense. still trying...

 

[ixnay5]

i just pulled the isNAN(q) from the function and put this:

function tst_qty(fieldobj)  {
	
	
	//if the value entered isn't acceptable, bail out
	var v = parseFloat(fieldobj.value);
	if (isNaN(v)) {
		errors = "Please enter a number";
		alert(errors);
		return false;
	}
	return true;
}

as an onchange() in the text box itself.