if (document.all) {docObj = document.all;} else {docObj = document}

function OK (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("Please fill in the Email field.")
	return false
}

var user=matchArray[1]
var domain=matchArray[2]

if (user.match(userPat)==null) {

    alert("Please fill in the Email field.")
    return false
}

var IPArray=domain.match(ipDomainPat)

if (IPArray!=null) {
  	  for (var i=1;i<=4;i++) {
    if (IPArray[i]>255) {
	        alert("Please fill in the Email field.")
		return false
    }
}
    return true
}

var domainArray=domain.match(domainPat)

if (domainArray==null) {
	alert("Please fill in the Email field.")
    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>3) {

alert("Please fill in the Email field.")

return false

}

if (len<2) {

   var errStr="Please fill in the Email field."
   alert(errStr)
   return false}
return true;
}