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+/*
+	Adobe Systems Incorporated(r) Source Code License Agreement
+	Copyright(c) 2005 Adobe Systems Incorporated. All rights reserved.
+	
+	Please read this Source Code License Agreement carefully before using
+	the source code.
+	
+	Adobe Systems Incorporated grants to you a perpetual, worldwide, non-exclusive, 
+	no-charge, royalty-free, irrevocable copyright license, to reproduce,
+	prepare derivative works of, publicly display, publicly perform, and
+	distribute this source code and such derivative works in source or 
+	object code form without any attribution requirements.  
+	
+	The name "Adobe Systems Incorporated" must not be used to endorse or promote products
+	derived from the source code without prior written permission.
+	
+	You agree to indemnify, hold harmless and defend Adobe Systems Incorporated from and
+	against any loss, damage, claims or lawsuits, including attorney's 
+	fees that arise or result from your use or distribution of the source 
+	code.
+	
+	THIS SOURCE CODE IS PROVIDED "AS IS" AND "WITH ALL FAULTS", WITHOUT 
+	ANY TECHNICAL SUPPORT OR ANY EXPRESSED OR IMPLIED WARRANTIES, INCLUDING,
+	BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+	FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  ALSO, THERE IS NO WARRANTY OF 
+	NON-INFRINGEMENT, TITLE OR QUIET ENJOYMENT.  IN NO EVENT SHALL MACROMEDIA
+	OR ITS SUPPLIERS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+	EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 
+	PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
+	OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 
+	WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR 
+	OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOURCE CODE, EVEN IF
+	ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+*/
+
+package com.adobe.utils
+{
+	
+	/**
+	* 	Class that contains static utility methods for manipulating Strings.
+	* 
+	* 	@langversion ActionScript 3.0
+	*	@playerversion Flash 9.0
+	*	@tiptext
+	*/		
+	public class StringUtil
+	{
+
+		
+		/**
+		*	Does a case insensitive compare or two strings and returns true if
+		*	they are equal.
+		* 
+		*	@param s1 The first string to compare.
+		*
+		*	@param s2 The second string to compare.
+		*
+		*	@returns A boolean value indicating whether the strings' values are 
+		*	equal in a case sensitive compare.	
+		*
+		* 	@langversion ActionScript 3.0
+		*	@playerversion Flash 9.0
+		*	@tiptext
+		*/			
+		public static function stringsAreEqual(s1:String, s2:String, 
+											caseSensitive:Boolean):Boolean
+		{
+			if(caseSensitive)
+			{
+				return (s1 == s2);
+			}
+			else
+			{
+				return (s1.toUpperCase() == s2.toUpperCase());
+			}
+		}
+		
+		/**
+		*	Removes whitespace from the front and the end of the specified
+		*	string.
+		* 
+		*	@param input The String whose beginning and ending whitespace will
+		*	will be removed.
+		*
+		*	@returns A String with whitespace removed from the begining and end	
+		*
+		* 	@langversion ActionScript 3.0
+		*	@playerversion Flash 9.0
+		*	@tiptext
+		*/			
+		public static function trim(input:String):String
+		{
+			return StringUtil.ltrim(StringUtil.rtrim(input));
+		}
+
+		/**
+		*	Removes whitespace from the front of the specified string.
+		* 
+		*	@param input The String whose beginning whitespace will will be removed.
+		*
+		*	@returns A String with whitespace removed from the begining	
+		*
+		* 	@langversion ActionScript 3.0
+		*	@playerversion Flash 9.0
+		*	@tiptext
+		*/	
+		public static function ltrim(input:String):String
+		{
+			var size:Number = input.length;
+			for(var i:Number = 0; i < size; i++)
+			{
+				if(input.charCodeAt(i) > 32)
+				{
+					return input.substring(i);
+				}
+			}
+			return "";
+		}
+
+		/**
+		*	Removes whitespace from the end of the specified string.
+		* 
+		*	@param input The String whose ending whitespace will will be removed.
+		*
+		*	@returns A String with whitespace removed from the end	
+		*
+		* 	@langversion ActionScript 3.0
+		*	@playerversion Flash 9.0
+		*	@tiptext
+		*/	
+		public static function rtrim(input:String):String
+		{
+			var size:Number = input.length;
+			for(var i:Number = size; i > 0; i--)
+			{
+				if(input.charCodeAt(i - 1) > 32)
+				{
+					return input.substring(0, i);
+				}
+			}
+
+			return "";
+		}
+
+		/**
+		*	Determines whether the specified string begins with the spcified prefix.
+		* 
+		*	@param input The string that the prefix will be checked against.
+		*
+		*	@param prefix The prefix that will be tested against the string.
+		*
+		*	@returns True if the string starts with the prefix, false if it does not.
+		*
+		* 	@langversion ActionScript 3.0
+		*	@playerversion Flash 9.0
+		*	@tiptext
+		*/	
+		public static function beginsWith(input:String, prefix:String):Boolean
+		{			
+			return (prefix == input.substring(0, prefix.length));
+		}	
+
+		/**
+		*	Determines whether the specified string ends with the spcified suffix.
+		* 
+		*	@param input The string that the suffic will be checked against.
+		*
+		*	@param prefix The suffic that will be tested against the string.
+		*
+		*	@returns True if the string ends with the suffix, false if it does not.
+		*
+		* 	@langversion ActionScript 3.0
+		*	@playerversion Flash 9.0
+		*	@tiptext
+		*/	
+		public static function endsWith(input:String, suffix:String):Boolean
+		{
+			return (suffix == input.substring(input.length - suffix.length));
+		}	
+
+		/**
+		*	Removes all instances of the remove string in the input string.
+		* 
+		*	@param input The string that will be checked for instances of remove
+		*	string
+		*
+		*	@param remove The string that will be removed from the input string.
+		*
+		*	@returns A String with the remove string removed.
+		*
+		* 	@langversion ActionScript 3.0
+		*	@playerversion Flash 9.0
+		*	@tiptext
+		*/	
+		public static function remove(input:String, remove:String):String
+		{
+			return StringUtil.replace(input, remove, "");
+		}
+
+		/**
+		*	Replaces all instances of the replace string in the input string
+		*	with the replaceWith string.
+		* 
+		*	@param input The string that instances of replace string will be 
+		*	replaces with removeWith string.
+		*
+		*	@param replace The string that will be replaced by instances of 
+		*	the replaceWith string.
+		*
+		*	@param replaceWith The string that will replace instances of replace
+		*	string.
+		*
+		*	@returns A new String with the replace string replaced with the 
+		*	replaceWith string.
+		*
+		* 	@langversion ActionScript 3.0
+		*	@playerversion Flash 9.0
+		*	@tiptext
+		*/
+		public static function replace(input:String, replace:String, replaceWith:String):String
+		{
+			//change to StringBuilder
+			var sb:String = new String();
+			var found:Boolean = false;
+
+			var sLen:Number = input.length;
+			var rLen:Number = replace.length;
+
+			for (var i:Number = 0; i < sLen; i++)
+			{
+				if(input.charAt(i) == replace.charAt(0))
+				{   
+					found = true;
+					for(var j:Number = 0; j < rLen; j++)
+					{
+						if(!(input.charAt(i + j) == replace.charAt(j)))
+						{
+							found = false;
+							break;
+						}
+					}
+
+					if(found)
+					{
+						sb += replaceWith;
+						i = i + (rLen - 1);
+						continue;
+					}
+				}
+				sb += input.charAt(i);
+			}
+			//TODO : if the string is not found, should we return the original
+			//string?
+			return sb;
+		}
+	}
+}