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From: Stan Weiss <srweiss@erols.com>
Newsgroups: comp.lang.javascript
Subject: Re: How to Pass variable name to a function
Date: Thu, 12 Apr 2012 18:54:47 -0400
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Dr J R Stockton wrote:
> 
> In comp.lang.javascript message <4F85B0AE.A1E9FFD8@erols.com>, Wed, 11
> Apr 2012 12:26:22, Stan Weiss <srweiss@erols.com> posted:
> 
> >I have this code in a form which calls the save function.
> >
> ><TR><TD ALIGN="RIGHT">
> ><b>Valve Diameter in Millimetres </b>
> ></TD><TD>
> ><INPUT TYPE="text" NAME="VD" SIZE=7  onChange="save(stanForm.VD.value,
> >AInput, 'Valve Diameter')">
> ></TD></TR>
> >
> >function save( field, vary, text ) {
> >     if( isNaN( field ) )
> >     {
> >        alert( text + " is not numeric" );
> >     }
> >     else
> >     {
> >         AInput = eval(field);  // this Works
> >         vary = eval(field);    // this does not workWorks
> >     }
> >}
> >
> >Can anyone see what I am doing wrong?
> 
> Easily :
>   You are not saying which browser you have been using.
>   You have not posted complete working/failing code.
>   You have not reported the output (including "none") of the browser's
>     native, or another, debugger.
>   You've not remembered things said in the newsgroup FAQ.
>   You've not said exactly what you expect, nor what you get - that code
>     works as it should, only your expectations were wrong.
>   And, as a minor detail, your code is wrong.
> 
> To convert a typed input String to a Number, unary + is commonly best;
> neither too liberal nor too rigorous.  For example, AInput = +field .
> Then check that the value of AInput is admissible.
> 
>                                 And, posting from -0400, should you
>                                 be spelling Millimetres correctly ?

There are a few word spelled that way since the original code was
written by someone in
the UK. I am changing the User Interface. Here in the US I would have
used inches. <g> I mean "Atmospheric Pressure Reading in Millibars" or
"Vapour Pressure" <lol>

Stan

> 
> --
>  (c) John Stockton, nr London UK  ?@merlyn.demon.co.uk  IE8 FF8 Op11 Sf5 Cr15
>    news:comp.lang.javascript FAQ <http://www.jibbering.com/faq/index.html>.
>    <http://www.merlyn.demon.co.uk/js-index.htm> jscr maths, dates, sources.
>    <http://www.merlyn.demon.co.uk/> TP/BP/Delphi/jscr/&c, FAQ items, links.