Setting up a dependent form

[coneal4187]

[TABLE="width: 500"]
<tbody>[TR]
[TD]Vendor
[/TD]
[TD]Project
[/TD]
[TD]PO
[/TD]
[TD]Asset
[/TD]
[/TR]
[TR]
[TD]Apples Galore
[/TD]
[TD]Fall 10
[/TD]
[TD]11
[/TD]
[TD]Green
[/TD]
[/TR]
[TR]
[TD]Apples Galore
[/TD]
[TD]Fall 20
[/TD]
[TD]22
[/TD]
[TD]Yellow
[/TD]
[/TR]
[TR]
[TD]Johnny Appleseed
[/TD]
[TD]Fall 10
[/TD]
[TD]54
[/TD]
[TD]Red
[/TD]
[/TR]
[TR]
[TD]Johnny Appleseed
[/TD]
[TD]Fall 20
[/TD]
[TD]67
[/TD]
[TD]Pink
[/TD]
[/TR]
[TR]
[TD]Johnny Appleseed
[/TD]
[TD]Fall 20
[/TD]
[TD]67
[/TD]
[TD]Peach
[/TD]
[/TR]
</tbody>[/TABLE]

[TABLE="width: 386"]
<colgroup><col width="514" style="width: 386pt; mso-width-source: userset; mso-width-alt: 18797;"> <tbody>[TR]
[TD="width: 514, bgcolor: transparent"]I'm attempting to set up a "form" of sorts so that the user can select the vendor from a drop down and then the project if they'd like and then it would populate in a separate area the PO's and the assets associated with those PO's[/TD]
[/TR]
</tbody>[/TABLE]