Advance Checking

guys,

how to check the all textboxes fields in a form ?>

and make sure that either one of the field is filled with data and subsequently make a button appear for clicking

VB Code:

function showhide()
{
'Makes the button invisible
document.form1.button1.style.visibility = "hidden"
 
'Makes the button visible
document.form1.button1.style.visibility = "visible" 
}
 
'validate the form
if (document.FormName.Field.value == "") {
   valid = 0
}