<html> 
<head> 
<script language="JavaScript"> 
<!-- 
function checkField(formName)  { 
  if (formName.f1.value != "Joe") { 
     document.forms[0].f1.focus(); 
     document.forms[0].f1.select(); 
  } 
} 
//--> 
</script> 
</head> 
<body> 
<form> 
<pre> 
Field1 <input name="f1" onBlur="checkField(this.form)"><br> 
Field2 <input name="f2"> 
</pre> 
</form> 
</body> 
</html> 
 
            
          
     
  
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