null and number validation!!!

[tuam1234]

please help!!

in the code below, if the field is empty the alert message will appear but it completly ignores the isNumeric part. when a character is entered, no alert is shown and it continue to next page.

if ((document.formname.exp.value == "&quot|| (!isNumeric(document.formname.exp.value)))


{
alert("Please enter a valid card expiry date"
document.formname.exp.focus();
return false
}

Any response is greatly appreciated!!!

 

[simonchristieis]

Are you using VB instead of Javascript???


if ((document.formname.exp.value == "&quot|| (isNaN(document.formname.exp.value)))

simon

 

[tuam1234]

thanks for replying simon.. iv changed to "isNaN" but it still doesnt diffrenciate between a number and a character..

any other suggestions???

 

[simonchristieis]

try this:

ft = document.formname.exp.value 
if((isNaN(ft.value)) || (ft.value == null) || ft.value.length == 0)){
    alert("Please enter a valid card expiry date");
    ft.focus();
    return false
  }

simon

 

[BabyJeffy]

Try changing simon's code a little from:

ft = document.formname.exp.value

To:

ft = document.formname.exp

*grin* Jeff

 

[simonchristieis]

It's a MS Bug - honest!!

;o)

tx Jeff

 

[tuam1234]

tanx a mil simon, dat worked perfectly...

tanx to u 2 jeff.