function helpwin() {
popup=window.open('help.asp', 'Help','resizable=yes,scrollbars=yes,status=no,toolbar=no,menubar=no,width=450,height=480,screenX=10,left=10,screenY=30,top=30')
}
  function highlightButton(s) {
    if ("INPUT"==event.srcElement.tagName)
      event.srcElement.className=s
  }
function emailCheck (emailStr) {
var emailPat=/^(.+)@(.+)$/
var specialChars="\\(\\)<>@,;:\\\\\\\"\\.\\[\\]"
var validChars="\[^\\s" + specialChars + "\]"
var quotedUser="(\"[^\"]*\")"
var ipDomainPat=/^\[(\d{1,3})\.(\d{1,3})\.(\d{1,3})\.(\d{1,3})\]$/
var atom=validChars + '+'
var word="(" + atom + "|" + quotedUser + ")"
var userPat=new RegExp("^" + word + "(\\." + word + ")*$")
var domainPat=new RegExp("^" + atom + "(\\." + atom +")*$")
var matchArray=emailStr.match(emailPat)
if (matchArray==null) {
	alert("The address seems incorrect.")
	return false
}
var user=matchArray[1]
var domain=matchArray[2]
if (user.match(userPat)==null) {
    alert("Your name seems wrong.")
    return false
}
var IPArray=domain.match(ipDomainPat)
if (IPArray!=null) {
	  for (var i=1;i<=4;i++) {
	    if (IPArray[i]>255) {
	        alert("The address seems invalid.")
		return false
	    }
    }
    return true
}
var domainArray=domain.match(domainPat)
if (domainArray==null) {
	alert("The address seems invalid.")
    return false
}
var atomPat=new RegExp(atom,"g")
var domArr=domain.match(atomPat)
var len=domArr.length
if (domArr[domArr.length-1].length<2 ||
    domArr[domArr.length-1].length>4) {
   alert("The address seems incorrect.")
   return false
}
if (len<2) {
   var errStr="There is no hostname!"
   alert(errStr)
   return false
}
}

function toggle_visibility(id) {
       var e = document.getElementById(id);
       if(e.style.display == 'block')
          e.style.display = 'none';
       else
          e.style.display = 'block';
    }