You use the .disabled attribute to determine whether a screen field is ready for input or read-only.
The following code determines whether the vbcom-kunde field exists on the screen and whether it is ready for input:
`if ( vbcom-kunde.exists )`
`if ( vbcom-kunde.disabled )`
<! Value only -->
`vbcom-kunde`
`else`
<! ready for input -->
<input
type="text"
name="vbcom-kunde"
value "`vbcom-kunde`">
`endif`
`endif`