When user enter data in certain fields, is it possible to display password character like ********. This is to hide the actual data from onlooker

No, nothing that is actually secure. Apart from making the text colour the same as the background or something similar.

However if you use a custom dialog, it has a "password" option that does what you want. :)

you could use a script trigger after every character entered it would set the value into another field replacing a bullet into the user's entry field.

Sorry I forgot to mention I am using IWP. So custom dialog and script trigger is out of question. May be making text color the same as background might be enough

My bad for not picking up the IWP forum it was posted in...

I'm running into this issue right now as well. The workaround that we're using, albeit not yet 100% reliable, is to actually edit the javascript used to render the IWP pages and check to see if the word "password" exists in text immediately to the right of the field. If it does, then a custom piece of code is called that converts the field type from text to password. Like I said, it's not 100% reliable and doesn't work 100% across different browsers. If you're simply trying to create a login page then it might be easier to just use Filemakers built in authentication page.

Why Filemaker didn't implement a data formatting option to mask text is beyond me and really limits the ability to even use IWP when security is a major concern.