// Clear Form Fields
function clearForms()
{
  var i;
  for (i = 0; (i < document.forms.length); i++) {
    document.forms[i].reset();
  }
}

function combPhone()
{
var areacode = document.forms[0].area.value;
var exchange = document.forms[0].prefix.value;
var phonenum = document.forms[0].suffix.value;
if(areacode.length = 3 && exchange.length == 3 && phonenum.length == 4)
{
document.forms[0].Phone_.value = areacode + exchange + phonenum;
}
}

// Toggle Form Field Backgroung Color
function toggleColor(objElement)
{
  if (objElement.className=='normal')
    objElement.className='focus';
  else
    objElement.className='normal';
}

// Set Focus of Form Field
function setFocus(aField) 
{
   document.forms[0][aField].focus();
}

// Remove Unwanted Characters From a String
function trim(str)
{
   return str.replace(/^\s+|\s+$/g,'');
}

// Check for Valid Email Address
function isEmail(str)
{
   var regex = /^[-_.a-z0-9]+@(([-_a-z0-9]+\.)+(ad|ae|aero|af|ag|ai|al|am|an|ao|aq|ar|arpa|as|at|au|aw|az|ba|bb|bd|be|bf|bg|bh|bi|biz|bj|bm|bn|bo|br|bs|bt|bv|bw|by|bz|ca|cc|cd|cf|cg|ch|ci|ck|cl|cm|cn|co|com|coop|cr|cs|cu|cv|cx|cy|cz|de|dj|dk|dm|do|dz|ec|edu|ee|eg|eh|er|es|et|eu|fi|fj|fk|fm|fo|fr|ga|gb|gd|ge|gf|gh|gi|gl|gm|gn|gov|gp|gq|gr|gs|gt|gu|gw|gy|hk|hm|hn|hr|ht|hu|id|ie|il|in|info|int|io|iq|ir|is|it|jm|jo|jp|ke|kg|kh|ki|km|kn|kp|kr|kw|ky|kz|la|lb|lc|li|lk|lr|ls|lt|lu|lv|ly|ma|mc|md|mg|mh|mil|mk|ml|mm|mn|mo|mp|mq|mr|ms|mt|mu|museum|mv|mw|mx|my|mz|na|name|nc|ne|net|nf|ng|ni|nl|no|np|nr|nt|nu|nz|om|org|pa|pe|pf|pg|ph|pk|pl|pm|pn|pr|pro|ps|pt|pw|py|qa|re|ro|ru|rw|sa|sb|sc|sd|se|sg|sh|si|sj|sk|sl|sm|sn|so|sr|st|su|sv|sy|sz|tc|td|tf|tg|th|tj|tk|tm|tn|to|tp|tr|tt|tv|tw|tz|ua|ug|uk|um|us|uy|uz|va|vc|ve|vg|vi|vn|vu|wf|ws|ye|yt|yu|za|zm|zw)|(([0-9][0-9]?|[0-1][0-9][0-9]|[2][0-4][0-9]|[2][5][0-5])\.){3}([0-9][0-9]?|[0-1][0-9][0-9]|[2][0-4][0-9]|[2][5][0-5]))$/i;

return regex.test(str);
}

// Validate Form Fields
function validate_form ( )
{
    valid = false;

    if (document.contactinfo.Location_.value == "" )
    {
        alert ( "Please select the Restaurant you visit most often." );
        return valid;
    }

    else if (document.contactinfo.FirstName_.value == "" )
    {
        alert ( "Please provide your 'First Name'." );
        setFocus("FirstName_");
        return valid;
    }

    else if ( document.contactinfo.LastName_.value == "" )
    {
        alert ( "Please provide your 'Last Name'." );
        setFocus("LastName_");
        return valid;
    }

    else if (!isEmail(document.contactinfo.email.value))
    {
        alert ( "Please provide a valid 'Email' address." );
        setFocus("email");
        return valid;        
    }

    else if ( document.contactinfo.month.value == "" || (isNaN(parseInt(document.contactinfo.month.value))) )
    {
        alert ( "Please provide the Month of your 'Birthday'." );
        setFocus("month");
        return valid;
    }

    else if ( document.contactinfo.day.value == "" || (isNaN(parseInt(document.contactinfo.day.value))) )
    {
        alert ( "Please provide the Day of your 'Birthday'." );
        setFocus("day");
        return valid;
    }

    else if ( document.contactinfo.year.value == "" || (isNaN(parseInt(document.contactinfo.year.value))) )
    {
        alert ( "Please provide the Year of your 'Birthday'." );
        setFocus("year");
        return valid;
    }

    else
    {
       valid = true;
       return valid;
    }       
}