function validEmail(email) {
invalidChars = " /:,;"
if (email == "") {
    return false
}

for (i=0; i<invalidChars.length; i++) {
    badChar = invalidChars.charAt(i)
    if (email.indexOf (badChar,0) != -1) {
        return false
    }
}  // for (i=o.. 

atPos = email.indexOf ("@",1)

if (atPos == -1) {
    return false
}

if ( email.indexOf ("@", atPos+1) != -1) {
    return false
}
periodPos = email.indexOf (".", atPos)

if ( periodPos == -1) {
    return false
}

if ( periodPos+3 > email.length)    {
    return false
}
return true
}  // validEmail


function checkform(email) {
var items = "";

	if(!validEmail(email)) {
		items += "\nThe E-mail address is not a valid E-mail address";
	}
		
	if(items == "") {
	return true;
	} else {
	alert(items);
	return false;
	}
}