function cmtrim(str) {
	return str.replace(/^ */,"").replace(/ *$/,"");
}
function isDigit(str) {
    var reDigit = /^\d/
    return reDigit.test(str)
}

//function to check valid email address
function isValidEmail(strEmail){
   if (strEmail == "") return true;
  validRegExp = /^[^@]+@[^@]+.[a-z]{2,}$/i;
   if (strEmail.search(validRegExp) == -1)
		return false;
    else return true;
}
function ValidateNewsLetterPage(Frm) {
   if (cmtrim(Frm.email.value) == "") { alert('Please enter email address.'); Frm.email.focus(); return false; }
   if (!ValidateEmail(Frm.email)) return false;
   if (Frm.chk_newsletter.checked == false) { alert('Please select I wish to receive regular newsletters from bipolar.com.au.'); Frm.chk_newsletter.focus(); return false; }
   if (Frm.chk_privacy.checked == false) { alert('Please select I have read the privacy statement'); Frm.chk_privacy.focus(); return false; }
   return true;
}

function ValidateEmail(oAddress) {
    if (! isValidEmail(cmtrim(oAddress.value))) { alert('Please enter valid Email Address'); oAddress.focus(); return false; } 
    return true;
}