// JavaScript Document

//********************************************************************
//*-------------------------------------------------------------------
//* Licensed Materials - Property of IBM
//*
//* WebSphere Commerce
//*
//* (c) Copyright International Business Machines Corporation. 2003
//*     All rights reserved.
//*
//* US Government Users Restricted Rights - Use, duplication or
//* disclosure restricted by GSA ADP Schedule Contract with IBM Corp.
//*
//*-------------------------------------------------------------------
//*

//////////////////////////////////////////////////////////
// Checks whether a string contains a double byte character
// target = the string to be checked
//
// Return true if target contains a double byte char; false otherwise
//////////////////////////////////////////////////////////
function containsDoubleByte (target) {
     var str = new String(target);
     var oneByteMax = 0x007F;

     for (var i=0; i < str.length; i++){
        chr = str.charCodeAt(i);
        if (chr > oneByteMax) {return true;}
     }
     return false;
}

//////////////////////////////////////////////////////////
// A simple function to validate an email address
// It does not allow double byte characters
// strEmail = the email address string to be validated
//
// Return true if the email address is valid; false otherwise
//////////////////////////////////////////////////////////
function isValidEmail(strEmail){
	// check if email contains dbcs chars
	if (containsDoubleByte(strEmail)){
		return false;
	}
	
	if(strEmail.length == 0) {
		return true;
	} else if (strEmail.length < 5) {
             return false;
       	}else{
           	if (strEmail.indexOf(" ") > 0){
                      	return false;
               	}else{
                  	if (strEmail.indexOf("@") < 1) {
                            	return false;
                     	}else{
                           	if (strEmail.lastIndexOf(".") < (strEmail.indexOf("@") + 2)){
                                     	return false;
                                }else{
                                        if (strEmail.lastIndexOf(".") >= strEmail.length-2){
                                        	return false;
                                        }
                              	}
                       	}
              	}
       	}
      	return true;
}


//////////////////////////////////////////////////////////
// This function will validate the zipCode as entered by the user
// Original:  Brian Swalwell
//
// 
//////////////////////////////////////////////////////////
function validateZIP(field) {
var valid = "0123456789-";
var hyphencount = 0;

if (field.length!=5 && field.length!=10) {
alert("Please enter your 5 digit or 5 digit+4 zip code.");
return false;
}
for (var i=0; i < field.length; i++) {
temp = "" + field.substring(i, i+1);
if (temp == "-") hyphencount++;
if (valid.indexOf(temp) == "-1") {
alert("Invalid characters in your zip code.  Please try again.");
return false;
}
if ((hyphencount > 1) || ((field.length==10) && ""+field.charAt(5)!="-")) {
alert("The hyphen character should be used with a properly formatted 5 digit+four zip code, like '12345-6789'.   Please try again.");
return false;
   }
}
return true;
}

//////////////////////////////////////////////////////////
// This function will count the number of bytes
// represented in a UTF-8 string
//
// arg1 = the UTF-16 string
// arg2 = the maximum number of bytes allowed in your input field
// Return false is this input string is larger then arg2
// Otherwise return true...
//////////////////////////////////////////////////////////
function isValidUTF8length(UTF16String, maxlength) {
    if (utf8StringByteLength(UTF16String) > maxlength) return false;
    else return true;
}

//////////////////////////////////////////////////////////
// This function will count the number of bytes
// represented in a UTF-8 string
//
// arg1 = the UTF-16 string you want a byte count of...
// Return the integer number of bytes represented in a UTF-8 string
//////////////////////////////////////////////////////////
function utf8StringByteLength(UTF16String) {
  if (UTF16String === null) return 0;
  var str = String(UTF16String);
  var oneByteMax = 0x007F;
  var twoByteMax = 0x07FF;
  var byteSize = str.length;

  for (i = 0; i < str.length; i++) {
    chr = str.charCodeAt(i);
    if (chr > oneByteMax) byteSize = byteSize + 1;
    if (chr > twoByteMax) byteSize = byteSize + 1;
  }  
  return byteSize;
}

function checkLabel(fieldId, action) {
        //Determines when and when not to put labels inside text boxes.
        var fld = document.getElementById(fieldId);
        var newClassName;
       
        //Different label depending on the field
        if (fieldId == "logonId") {
                newClassName="user_id";
        }
        else {
                newClassName="password";
        }
       
        switch(action){
                case "show" :
                        fld.className="newClassName";
                        break;
                case "hide" :
                        fld.className="textbox_nolabel";
                        break;                        
                case "decide" :
                        //If field empty then show label else hide label
                        if (emptyField(fld)){                
                                fld.className=newClassName;
                        }
                        else {  
                                fld.className="textbox_nolabel";
                        }
                        break;
                default :
                        alert("Invaid 'action' parm for checkLabel()!")
        } //End switch

}

function emptyField(textObj) {
        //Returns true when field is empty.
        //The field Object is passed in - not a string.
        try{
			if (textObj.value.length == 0) return true;
        	for (var i=0; i<textObj.value.length; ++i) {
                        var ch = textObj.value.charAt(i);
                        if (ch != " " && ch != '\t') return false;
                }
		}
		catch(error){// If we get an error, just ignore it since it's usually because the object does not exist
		}        
        return true;        
} 

function include_js(script_filename) {
    var html_doc = document.getElementsByTagName('head').item(0);
    var js = document.createElement('script');
    js.setAttribute('language', 'javascript');
    js.setAttribute('type', 'text/javascript');
    js.setAttribute('src', script_filename);
    html_doc.appendChild(js);
    return false;
}