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Trim in javascript

164 New Member
Hi all

Am creating a form that contains several fields like name, phone, email etc.,

Users have to fill up the forms without leaving blank to those fields..

I have given script not to leave a field empty...


But some people giving spaces to those fields and giving submit..

So i have to avoid this problem...

Help me to do this..

Thanx all
Jun 29 '07 #1
3 1531
gits
5,390 Recognized Expert Moderator Expert
hi ...

have a look at the following example:

Expand|Select|Wrap|Line Numbers
  1. // input in field
  2. var j = '      r t      '; 
  3.  
  4. // match with regEx and replace spaces
  5. j = j.replace(/(^\s+|\s+$)/g, ''); 
  6.  
  7. // j == 'r t' now ;)
  8. alert(j == '');
  9.  
the regEx matches all blanks at begin and end of the string that has to be checked ... we replace them and the alert shows you the boolean-value of your empty-condition

kind regards ...
Jun 29 '07 #2
arunbalait
164 New Member
Ya thanx

I shall check it out...

Is there any other method...

And I dont want using functions
Jun 29 '07 #3
gits
5,390 Recognized Expert Moderator Expert
Is there any other method...
hmmm ... you may compare the value to 0:

Expand|Select|Wrap|Line Numbers
  1. // gives you a true ;) but its ugly and the value is not trimmed
  2. alert('             '  ==  0);
  3.  
  4. // gives you a false
  5. alert('          f  '  ==  0);
  6.  
And I dont want using functions
Why not?

kind regards ...
Jun 29 '07 #4

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