Trouble in Validation

rajatgupta_iitr · Joined: 13 Sep 2006 Posts: 2

i need to ensure an entry in a text box.at the same I need to ensure that the entry is not in the form of spaces i.e. it needs to be some alphabets or numbers or special characters only.
I am giving the function that I invoked by onSubmit

function ensure_item()
{
if(formname.textitemname.value=="")
{alert("You must enter a value for Item");
formname.textitemname.focus();
return false;}
else return true;
}

and I simply used onSubmit="ensure_item()" in the form tag.

Now the code works as long as user types'nothing' in the test box but if he types a series of spaces the code no longer works and validation fails.

Please help...i wd really appreciate if some modifications in the code i gave are suggested.

thanks in advance
Rajat

degsy · Joined: 23 Feb 2005 Posts: 2440 Location: North East, UK

For a basic hardcoded script you can simply check for a space.

rajatgupta_iitr · Joined: 13 Sep 2006 Posts: 2

hi,
Thaks for ur help in validation problem.Can u tell ime if I can also use 'trim' function in the same context i.e. something like
if(!Trim(formname.field.value)=="')
{
alert("alert text");
return false;
}

I tried using this but it doesn't seem to work...maybe some syntactic error because I m very new to javascript and programming in general.
Actually the reason for wanting to know this is that I think if I use Trim then even if the user enters some spaces followed by commas then the function wd work .
the solution u provided works if there are all spaces but if there is some text along with commas it still alerts the user and forces him to remove spaces which I do not want.
My intention is only to ensure that some text be ther...with or without spaces but not just spaces.

it wd be great if u cd help

degsy · Joined: 23 Feb 2005 Posts: 2440 Location: North East, UK

Javscript doesn't have a built in trim function.

You can create one though
http://www.faqts.com/knowledge_base/view.phtml/aid/1678/fid/1