function checkFields(){
    if ($('thename') && trimAll($('thename').value)==''){
        alert('Your name is missiong');
        $('thename').focus();
        return false;
    }
    if ($('surname') && trimAll($('surname').value)==''){
        alert('Your surname is missiong');
        $('surname').focus();
        return false;
    }
    if ($('company') && trimAll($('company').value)==''){
        alert('Company name is missiong');
        $('company').focus();
        return false;
    }
    if ($('postcode') && trimAll($('postcode').value)==''){
        alert('Postcode is missiong');
        $('postcode').focus();
        return false;
    }
    if ($('email') && $('email').value.indexOf('@')==-1){
       alert('Invalid email address');
       $('email').focus();
       return false;
    }
    return true;

}

function trimAll(sString)
{
	while (sString.substring(0,1) == ' ')
	{
	   sString = sString.substring(1, sString.length);
	}
	while (sString.substring(sString.length-1, sString.length) == ' ')
	{
	   sString = sString.substring(0,sString.length-1);
	}
	return sString;
}