/* Licensed Materials - Property of IBM : WebSphere Commerce Utility Functions */

/* Checks whether a string contains a double byte character */
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 */
function isValidEmail(strEmail){
	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 count the number of bytes represented in a UTF-8 string */
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 */
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;
}