// Check a file for valid JPG Extension...
// Author. John D. Coryat 07/2005...
// Copyright 1997-2005 John Coryat Systems. All rights reserved.

function jpgcheck(file,id,mid)
{
 var fileStr = file.value ;
 var strExtn = fileStr.substring((fileStr.indexOf(".")+1)) ;

 if (strExtn.toLowerCase() != "jpg")
 {
  document.getElementById(mid).innerHTML = "Invalid File Type (." + strExtn + ") - Must be a .jpg only." ;
  setfocus(file) ;
  return(false) ;
 }
 document.getElementById(mid).innerHTML = "" ;
 return true ;
}

function FocusDelay(xfield)
{
  b_xfield.focus() ;
}

function setfocus(xfield)
{
 b_xfield = xfield ;
 setTimeout( 'FocusDelay()', 100 ) ;
}