//Form Validation for Form Name/ID: EmailForm/EmailForm

function validateEmail(form) {
    if ( isBlank(form.email.value)) {
        window.alert('Please enter your e-mail address.');
        form.email.focus();
        return false;
    }
    else if ( !checkEmailAddress(form.email.value) ) {
      form.email.value = "";
      window.alert("Please enter a valid email address.");
      form.email.focus();
      return false;
	}	
    return true;
}

function checkEmail(form) {
    if ( isBlank(form.email.value)) {
        window.alert('Please enter your e-mail address.');
        form.email.focus();
        return false;
    }
    else if ( !checkEmailAddress(form.email.value) ) {
      form.email.value = "";
      window.alert("Please enter a valid email address.");
      form.sf_email_addr.focus();
      return false;
	}	
    return true;
}

function isBlank(s) {
    for( var i=0;i<s.length;i++ ) {
        var c = s.charAt(i);
        if( (c != ' ') && (c != '\n') && (c != '\t') )
            return false;
        }
        return true;
    }

function checkEmailAddress( 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) {
        return false
    }
    var user=matchArray[1]
    var domain=matchArray[2]
    if (user.match(userPat)==null) {
        return false
    }
    var IPArray=domain.match(ipDomainPat)
    if (IPArray!=null) {
        for (var i=1;i<=4;i++) {
            if (IPArray[i]>255) {
                return false
            }
        }
        return true
    }
    var domainArray=domain.match(domainPat)
    if (domainArray==null) {
        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) {
        return false
    }
    // Make sure there's a host name preceding the domain.
    if (len<2) {
        return false
    }
    return true;
}