// JavaScript Document
function validate_submit(){
	var chks = document.getElementsByName('items[]');
	var hasChecked = false;
	for (var i = 0; i < chks.length; i++)
	{
		if (chks[i].checked)
		{
			hasChecked = true;
	if(document.getElementById('Name').value==''){
		alert("Please enter your name");
		document.getElementById('Name').focus();
		return false;
	}
	else if(!isValidEmail(trim(document.getElementById('email').value))){
		alert("Invalid email id.");
		document.getElementById('email').focus();
		return false;
	}
	else if(document.getElementById('address').value==''){
		alert("Please enter your address.");
		document.getElementById('address').focus();
		return false;
	}
	else if(document.getElementById('City').value==''){
		alert("Please enter your city.");
		document.getElementById('City').focus();
		return false;
	}
	else if(document.getElementById('int_air').value==''){
		alert("Please enter your Nearest Int'l Airport.");
		document.getElementById('int_air').focus();
		return false;
	}
	else if(document.getElementById('Country').value==''){
		alert("Please enter your country.");
		document.getElementById('Country').focus();
		return false;
	}
	else{
		return true;
	}
	}}
	if (hasChecked == false)
	{
		alert("You must place a check mark in one or more of the boxes to receive our product information and prices. Check off as many items as you wish. ");
		return false;
	}
}





function isValidEmail(email, required) {
    if (required==undefined) {   // if not specified, assume it's required
        required=true;
    }
    if (email==null) {
        if (required) {
            return false;
        }
        return true;
    }
    if (email.length==0) {  
        if (required) {
            return false;
        }
        return true;
    }
    if (! allValidChars(email)) {  // check to make sure all characters are valid
        return false;
    }
    if (email.indexOf("@") < 1) { //  must contain @, and it must not be the first character
        return false;
    } else if (email.lastIndexOf(".") <= email.indexOf("@")) {  // last dot must be after the @
        return false;
    } else if (email.indexOf("@") == email.length) {  // @ must not be the last character
        return false;
    } else if (email.indexOf("..") >=0) { // two periods in a row is not valid
	return false;
    } else if (email.indexOf(".") == email.length) {  // . must not be the last character
	return false;
    }
    return true;
}
function trim(str, chars) {
	return ltrim(rtrim(str, chars), chars);
}
 
function ltrim(str, chars) {
	chars = chars || "\\s";
	return str.replace(new RegExp("^[" + chars + "]+", "g"), "");
}
 
function rtrim(str, chars) {
	chars = chars || "\\s";
	return str.replace(new RegExp("[" + chars + "]+$", "g"), "");
}
function allValidChars(email) {
  var parsed = true;
  var validchars = "abcdefghijklmnopqrstuvwxyz0123456789@.-_";
  for (var i=0; i < email.length; i++) {
    var letter = email.charAt(i).toLowerCase();
    if (validchars.indexOf(letter) != -1)
      continue;
    parsed = false;
    break;
  }
  return parsed;
}

	function isDate(str)
	{
		  var myDate = new Date(str);
	 
		  return !isNaN(myDate);
	 }
	 
	 
	 
function isValidEmail(bill_email, required) {
    if (required==undefined) {   // if not specified, assume it's required
        required=true;
    }
    if (bill_email==null) {
        if (required) {
            return false;
        }
        return true;
    }
    if (bill_email.length==0) {  
        if (required) {
            return false;
        }
        return true;
    }
    if (! allValidChars(bill_email)) {  // check to make sure all characters are valid
        return false;
    }
    if (bill_email.indexOf("@") < 1) { //  must contain @, and it must not be the first character
        return false;
    } else if (bill_email.lastIndexOf(".") <= bill_email.indexOf("@")) {  // last dot must be after the @
        return false;
    } else if (bill_email.indexOf("@") == bill_email.length) {  // @ must not be the last character
        return false;
    } else if (bill_email.indexOf("..") >=0) { // two periods in a row is not valid
	return false;
    } else if (bill_email.indexOf(".") == bill_email.length) {  // . must not be the last character
	return false;
    }
    return true;
}
function trim(str, chars) {
	return ltrim(rtrim(str, chars), chars);
}
 
function ltrim(str, chars) {
	chars = chars || "\\s";
	return str.replace(new RegExp("^[" + chars + "]+", "g"), "");
}
 
function rtrim(str, chars) {
	chars = chars || "\\s";
	return str.replace(new RegExp("[" + chars + "]+$", "g"), "");
}
function allValidChars(bill_email) {
  var parsed = true;
  var validchars = "abcdefghijklmnopqrstuvwxyz0123456789@.-_";
  for (var i=0; i < bill_email.length; i++) {
    var letter = bill_email.charAt(i).toLowerCase();
    if (validchars.indexOf(letter) != -1)
      continue;
    parsed = false;
    break;
  }
  return parsed;
}

	function isDate(str)
	{
		  var myDate = new Date(str);
	 
		  return !isNaN(myDate);
	 }