how do I assign a destination page in adobe acrobat using javascript with a form field button?

Thanks for responding.
I have a 22 page pdf document that users will navigate through using buttons on the top of the page.  One of these buttons will take them to the contents page of the document.  Each page will have a link to the contents page which is on page 3.  Previously I have used the link tool in acrobat and created individual links on each page to navigate the user to the contents page.  I want to know how to use the form field tool to create a link to a page in a document.  The form field is the only button I know of that can be duplicated on each page automatically. Javascript is an option for the acrtion you assign to the form field button.  I have tried 'this.pageNum=3' but this seems to come up with the wrong page.

btech1

I have just tried 'this.pageNum=+2' and it works thank you for pointing me in the right direction!

Thanks for the grade A.

Btw, you may already know this this.pageNum=++ advance to next page

Spoke to soon.  It doesn't work. That code only advances you two pages back or something.

Can you help?

My mistake it does work. I wish I knew what I was doing.

No problem. Let me know if need help on this.

this.pageNum=2 has got me to the contents page which was on page two not three.  Looks like it is fine now.  Thanks again for your help that has been stumped me for about  year and a half.

Fyi, here is an example to create simple navigational links in the lower left and right corners of each page of the current document. The link in lower left corner goes to the previous page; the one in the lower right corner goes to the next page.

var linkWidth = 36, linkHeight = 18;
for ( var i=0; i < this.numPages; i++)
{
      var cropBox = this.getPageBox("Crop", i);
      var linkRect1 = [0,linkHeight,linkWidth,0];
      var offsetLink = cropBox[2] - cropBox[0] - linkWidth;
      var linkRect2 = [offsetLink,linkHeight,linkWidth + offsetLink,0]
      var lhLink = this.addLink(i, linkRect1);
      var rhLink = this.addLink(i, linkRect2);
      var nextPage = (i + 1) % this.numPages;
      var prevPage = (i - 1) % this.numPages;
      var prevPage = (prevPage>=0) ? prevPage : -prevPage;
      lhLink.setAction( "this.pageNum = " + prevPage);
      lhLink.borderColor = color.red;
      lhLink.borderWidth = 1;
      rhLink.setAction( "this.pageNum = " + nextPage);
      rhLink.borderColor = color.red;
      rhLink.borderWidth = 1;
}

Later!