function trim(s) {

    if((s==null)||(typeof(s)!='string')||!s.length) {
        return '';
    }
    return s.replace(/^\s+/,'').replace(/\s+$/,'');

}

function check_blank(field) {

    if (field == '') {
        return false;
    }
    if (trim(field) == '') {
        return false;
    }
    return true;
}

function echeck(str) {

      var at="@";
      var dot=".";
      var lat=str.indexOf(at);
      var lstr=str.length;
      var ldot=str.indexOf(dot);

      if (str.indexOf(at)==-1){
           return false;
      }

      if (str.indexOf(at)==-1 || str.indexOf(at)==0 || str.indexOf(at)==lstr){
          return false;
      }

      if (str.indexOf(dot)==-1 || str.indexOf(dot)==0 || str.indexOf(dot)==lstr){
          return false;
      }

      if (str.indexOf(at,(lat+1))!=-1){
          return false;
      }

      if (str.substring(lat-1,lat)==dot || str.substring(lat+1,lat+2)==dot){
          return false;
      }

      if (str.indexOf(dot,(lat+2))==-1){
          return false;
      }

      if (str.indexOf(" ")!=-1){
          return false;
      }

      return true;
}

function validate_inquiry() {
    
    var store = document.form1.store.value;
    var city = document.form1.city.value;
    var state = document.form1.state.value;
    var country = document.form1.country.value;
    var zip = document.form1.zip.value;
    var area = document.form1.area.value;
    var phone = document.form1.phone.value;
    var email = document.form1.email.value;

    if(!check_blank(store)) {
	alert('Store cannot be blank.');
	return false;
    }
    else if (!check_blank(city)) {
	alert('City cannot be blank.');
	return false;
    }
    else if (!check_blank(state)) {
	alert('State cannot be blank.');
	return false;
    }
    else if (!check_blank(country)) {
	alert('Country cannot be blank.');
	return false;
    }
    else if (!check_blank(zip)) {
	alert('Zip Code cannot be blank.');
	return false;
    }
    else if (!check_blank(area)) {
	alert('Phone number area code cannot be blank.');
	return false;
    }
    else if (!check_blank(phone)) {
	alert('Phone number cannot be blank.');
	return false;
    }
    else if (!check_blank(email)) {
	alert('Email cannot be blank.');
	return false;
    }
    else if (!echeck(email)) {
	alert('Invalid Email.');
	return false;
    }

    return true;
}

function validate_signup() {
    
    var email = document.form2.email.value;

    if (!check_blank(email)) {
  	alert('Email cannot be blank.');
	return false;
    }
    else if (!echeck(email)) {
	alert('Invalid Email.');
	return false;
    }
    return true;
}

function validateEmail() {
    
    var emailAddress = document.emailForm.emailAddress.value;

    if (!check_blank(emailAddress)) {
  	alert('Email cannot be blank.');
	return false;
    }
    else if (!echeck(emailAddress)) {
	alert('Invalid Email.');
	return false;
    }
    return true;
}

function validate_login() {
    
    var username = document.form3.username.value;
    var password = document.form3.password.value;

    if (!check_blank(username)) {
	alert('Client ID cannot be blank.');
	return false;
    }
    else if (!check_blank(password)) {
	alert('Password cannot be blank.');
	return false;
    }
    return true;
}