Required Fields and JavaScript Issue

hello,

 

i have created form required fields.  pdf not "submitted" submit button.  however, still want fillable , have required fields.  pulled javascript below adobe acrobat developer tips , works great on mac.  however, when test on windows side freezes , crashes adober reader x.

 

i used acrobat pro 9 on mac side create form.  use same versions of acrobat reader x on windows side , mac side.

 

here javascript using.

 

f = getfield(event.target.name)

if (f.value.length == 0)

    {
    f.setfocus()
        

    //optional message - comment out next line remove
        

    app.alert("this field required. please enter value.")
         

    }

 

 

i removed javascript action , tested again on windows side , opened fine of course required function not there without javascript.  so, seems though javascript causing weird compatability issue? i'm not sure solution is.

 

any guidance appreciated. 

where putting code? in field event, or document event?

 

also,

f = getfield(event.target.name)

can shortened to

f = event.target

 

 

and can shorten further if need value from

f = getfield(event.target.name)

if (f.value.length == 0)

 

to 1 of following (depending on event using code

if (event.value.length == 0)

if (event.target.value.length == 0)

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