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javascript it a string?

P: 7
hi, i'm wondering why is it javascript doesn't seem to accept null value as a real null? In order to know if its a null field later on, it's as if i have to check it against a string 'null'.

for example,
i have a txtName hidden field on my html.

I use javascript to

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  1. document.myForm.txtName.value = null;
later on, when i try to detect it just doesn't work :

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  1. if(document.myForm.txtName.value == null){
  2.  alert('value is null');
  3. }else if(document.myForm.txtName.value == 'null'){
  4.  alert('value is a string null'); //only this works!
  5. }
Nov 24 '07 #1
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1 Reply

Expert Mod 5K+
P: 5,390
hi ...

ALL values that you retrieve from a page/field are handled as strings ... since the value is considered as the nodeValue of a textnode ...

kind regards
Nov 24 '07 #2

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