Two Basic Questions about Prompt Boxes

Hi!

I just started learning Javascript & while practicing I got two problems I couldn't resolve.

The 1st is about this code:

if (name!=null && name!="")
 {
 document.write("whatever")
 }

Code (markup):

How can I add to it different actions for different input values?

Can I for example change

name!=null && name!=""

Code (markup):

to

& add a code for doing nothing between { } ? I tried to leave it blank but it didn't work

If I could do that I would be able then to add if ... else for different input values entered in the prompt box.

---------------

My second question is about the input values, in my tests i found they are case sensitive. Is there a way to remove that? I mean I want when users type in the prompt box digitalpoint, DigtalPoint, dIgitAlpOinT, etc they get the same action executed.

I tried my best to explain, I hope you got my point ... thanks in advance!

 

JavaScript is a case sensitive language; there's no way to change that. But here's what I do if I want to effect case-insensitive validation, where inputString is the string coming from the prompt box:

if ( inputString.toLowerCase() == "digitalpoint" )
  { do stuff }

Code (markup):

The trick here is the toLowerCase method - check it out at w3schools.com/jsref/jsref_toLowerCase.asp.

 

Nice! One problem solved! Thanks buddy!! I added to your reputation

Any help would be appreciated for my other problem, thanks!

 

No problem, and thanks for the props.

I was thinking about your first question, and there are a couple of things to know that might help you out.

First off, && indicates AND. So

if ( color == "blue" && color == "red" )

Code (markup):

will never evaluate to true, because color can't == both "blue" and "red". But

if ( color != "blue" && color != "red" )

Code (markup):

will sometimes be true, for instance if color == "green".

Second, when I want to 'do nothing', I just put some comments inside the { }:

if ( color != "blue" && color != "red" )
{ /*  Do nothing  */ }
else
{ alert("Could be green!"); }

Code (markup):

I apologize in advance if any of my syntax is wrong - I was just typing into the comments box here.

 

Thanks! What I did is I changed the 'and' with 'or' & it worked! So instead of:

if (name==null [COLOR="Red"]&&[/COLOR] name=="")
 {

 }
else if

Code (markup):

I put:

if (name==null [COLOR="Red"]||[/COLOR] name=="")
 {

 }
else if

Code (markup):

No it's just working fine, thanks again for help

 

I finished my 1st script, tell me what you think

The Internet "Big Fish" Restaurant!!

 

Not too shabby.

When I was first learning JavaScript, I made good traction by using the JavaScript tutorials on HTML Goodies. (htmlgoodies.com/primers/jsp/article.php/3478531)

The material's not modernized (it doesn't talk about Ajax or unobtrusive JS), but it does give you a good idea of what JavaScript can and can't do.

 

thanks for link, here's a clickable version for those who may need it:

http://htmlgoodies.com/primers/jsp/article.php/3478531