function Submit_onclick() {

 if (document.form1.userid.value  == "" || document.form1.userid.value == null) 
    { alert ("Userid must be entered")
      document.form1.userid.focus()
      return false
    }
 return true 
}
function onload() {
 
 
   document.form1.userid.focus()  
   document.form1.userid.select()
     
   return   
}