Quick easy question about IF function

[Markh51]

How do I say, if a given form field value is equal to nothing then do something, else do something else.

This is what I have, so far:

if(document.step3[FieldName].value = ''){

DO SOMETHING...

}
else{

DO SOMETHING ELSE...

}

but I can't seem to format the IF statment properly.

So how do I write if the passed value in form step3 equal to nothing then do it.

Also how do I write NOT EQUALS.

p.s FieldName is passed to the script as a variable.

Cheers.

 

[TootingBoy]

If you're testing the value of a variable you need to use the '=' twice. So your first line would need to be:

if(document.step3[FieldName].value == ''.

A single '=' is only used when assigning a value to a variable.

The path to freedom is seldom trodden by the multitude.

 

[sdi]

Your second question.. how do I write "not "qual"...

if(a != B){ // != is not equal
do something;
}


or you could play with this as well


if(!(a = B)){ // if a = B is not true
do something;
}

hope this helps you out

 

[sdi]

oops sorry... missed an = above

if(!(a == B)){ // if a = B is not true
do something;
}

 

[Markh51]

Thanks