check for parameter passed or not 1

[Frits]

What syntax should I use to check whether an optional parameter of a javascript function has been passed or not?

 

[jaredn]

something like this will determine if a non-false parameter was passed to the function:


function changeName(newname,field,disableit)
{
disableit = disabledit || false;
field.value = newname;
if(disableit)field.disabled = true;
} jared@eae.net -

http://webfx.eae.net

 

[jaredn]

this might work better, but for me, its usually fine to use the other technique:

function changeName(newname,field,disableit)
{
field.value = newname;
if(typeof(disableit)!='undefined'){
field.disabled = disableit;}
} jared@eae.net -

http://webfx.eae.net