var testresults

function checkemail(){
 var str=document.frmJoinEmail.txtJoinEmail.value
 var filter=/^.+@.+\..{2,3}$/

 if (filter.test(str))
    testresults=true
 else {
    alert("Please input a valid email address!")
    testresults=false
}
 return (testresults)
}

function checkbae(){
if (document.layers||document.all)
return checkemail()
else
return true
}