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HTML Pages with CSS and JavaScript

Stop Users from entering blanks in text form fiels

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posted 22 years ago

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How can we stop users from entering blanks in text form fiels. I could not find trim feature in the javascript.

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Garann Means

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posted 22 years ago

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Vijay,
If by "blanks", you mean that the user has declined to enter anything in the fields, something like this should work:

Hope that helps!
g.

Randall Twede

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posted 22 years ago

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since he mentioned trim() function, i think by blanks he means spaces. i believe you will have to parse the string looking for the space character which is, i believe, #160(or nbsp in IE but not netscape4.7). then you will have to remove them somehow. even if there is a trim() function it will only remove leading and trailing spaces. im pretty sure this has been done before. you can probly find a ready made script somewhere.

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Dhanashree Panse

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posted 22 years ago

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I have one javascript function which parses the string passed to it and if there are any spaces in it, the function returns true.
Here is the code :
function areSpacesPresent(sStringToCheck)
{
var bAreSpacesPresent = false;
for(var iCounter=0 ; iCounter<sStringToCheck.length ; iCounter=iCounter+1)
{
if (sStringToCheck.charAt(iCounter) == " ")
{
bAreSpacesPresent = true;
}
}
return bAreSpacesPresent;
}

Bear Bibeault

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posted 22 years ago

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Or, you could extend the String class itself with a trim method:

and then use it in your validation function.
hth,
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[ August 08, 2002: Message edited by: Bear Bibeault ]

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Matt Howard

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posted 22 years ago

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I use reguar expresssions for stuff like that...
Using that with String.prototype would be the best, but how is browser support for editing the prototype? I've only used it fo IE...
[ August 08, 2002: Message edited by: Matt Howard ]

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