if (i != 3 && end_index == -1)
				return false;
			else if (i == 3)
				end_index = a_IpAddress.length();

			String valueString = a_IpAddress.substring(start_index, end_index);
			if (debug)
				System.out.println(valueString);	
			if (ValueValidator.isNumeric(valueString) == false)
				return false;
			if (ValueValidator.rangeCheck(valueString, 0, 255) == false)
				return false;
			start_index = end_index + 1;
		}
		return true;
	}
	
	/** Check whether the argument value that represents a numeric number is 
	    within a certain range or not. If the argument a_Value does not 
	    represent a numeric number, returns false. If a_LowerLimit is greater 
	    than the a_UpperLimit, also return false. **/
    public static boolean rangeCheck(long a_Value, long a_LowerLimit, long a_UpperLimit)
    {
        if (a_LowerLimit > a_UpperLimit)
            return false;

        if (a_Value < a_LowerLimit || a_Value > a_UpperLimit)
            return false;

        return true;
    }
    
    /** Check whether the argument value that represents a numeric number is 
        within a certain range or not. If the argument a_Value does not 
        represent a numeric number, returns false. If a_LowerLimit is greater 
        than the a_UpperLimit, also return false. **/
    public static boolean rangeCheck(String a_Value, double a_LowerLimit, double a_UpperLimit)
    {
        if (a_LowerLimit > a_UpperLimit)
            return false;
        if (ValueValidator.isDouble(a_Value) == false)
            return false;;
        double number = Double.parseDouble(a_Value);
        if (number < a_LowerLimit || number > a_UpperLimit)
            return false;
        return true;
    }
    
    /** Check whether the argument value that represents a numeric number is 
        within a certain range or not. If the argument value does not 
        represent a numeric number, returns false. If a_LowerLimit is greater 
        than the a_UpperLimit, also return false. **/
    public static boolean rangeCheck(String a_Value, long a_LowerLimit, long a_UpperLimit)
    {
        if (a_LowerLimit > a_UpperLimit)
            return false;

        if (ValueValidator.isNumeric(a_Value) == false)
            return false;

        long number = Long.parseLong(a_Value);
        if (number < a_LowerLimit || number > a_UpperLimit)
            return false;

        return true;
    }
    
    /**
     * Check whether the argument a_Value that represents a numeric value is larger
     * than a_Limit or not. If a_Equal is true, it is checked for larger than or equal
     * to a_Limit. If the argument a_Value does not represent a numeric
     * value, returns false.
     **/
    public static boolean largerThan(String a_Value, long a_Limit, boolean a_Equal)
    {
    	if (ValueValidator.isNumeric(a_Value) == false)
            return false;
        
        long number = Long.parseLong(a_Value);
        if (a_Equal == true)
        {
        	if (number >= a_Limit)
        		return true;
        	else return false;
        }
        else
        {
        	if (number > a_Limit)
        		return true;
        	else return false;
        } 
    }
    
    /**
     * Check whether the argument a_Value that represents a numeric value is larger
     * than a_Limit or not. If a_Equal is true, it is checked for larger than or equal
     * to a_Limit. If the argument a_Value does not represent a numeric
     * value, returns false.
     **/
    public static boolean largerThan(String a_Value, int a_Limit, boolean a_Equal)
    {
    	if (ValueValidator.isNumeric(a_Value) == false)
            return false;
        
        long number = Integer.parseInt(a_Value);
        if (a_Equal == true)
        {
        	if (number >= a_Limit)
        		return true;
        	else return false;
        }
        else
        {
        	if (number > a_Limit)
        		return true;
        	else return false;
        } 
    }
    
    
    /**
     * Check whether the argument a_Value that represents a double value is larger
     * than a_Limit or not. If a_Equal is true, it is checked for larger than or equal
     * to a_Limit. If the argument a_Value does not represent a double
     * value, returns false.
     **/
    public static boolean largerThan(String a_Value, double a_Limit, boolean a_Equal)
    {
    	if (ValueValidator.isDouble(a_Value) == false)
            return false;
        
        double number = Double.parseDouble(a_Value);
        if (a_Equal == true)
        {
        	if (number >= a_Limit)
        		return true;
        	else return false;
        }
        else
        {
        	if (number > a_Limit)
        		return true;
        	else return false;
        } 
    }
    
    /**
     * Check whether the argument a_Value that represents a numeric value is smaller
     * than a_Limit or not. If a_Equal is true, it is checked for smaller than or equal
     * to a_Limit. If the argument a_Value does not represent a numeric
     * value, returns false.
     **/
    public static boolean smallerThan(String a_Value, long a_Limit, boolean a_Equal)
    {
    	if (ValueValidator.isNumeric(a_Value) == false)
            return false;
        
        long number = Long.parseLong(a_Value);
        if (a_Equal == true)
        {
        	if (number <= a_Limit)
        		return true;
        	else return false;
        }
        else
        {
        	if (number < a_Limit)
        		return true;
        	else return false;
        } 
    }
    
    /**
     * Check whether the argument a_Value that represents a double value is smaller
     * than a_Limit or not. If a_Equal is true, it is checked for smaller than or equal
     * to a_Limit. If the argument a_Value does not represent a double
     * value, returns false.
     **/
    public static boolean smallerThan(String a_Value, double a_Limit, boolean a_Equal)
    {
    	if (ValueValidator.isDouble(a_Value) == false)
            return false;
        
        double number = Double.parseDouble(a_Value);
        if (a_Equal == true)
        {
        	if (number <= a_Limit)
        		return true;
        	else return false;
        }
        else
        {
        	if (number < a_Limit)
        		return true;
        	else return false;
        } 
    }
    
    public static String escapeParam(Vector a_InputParams) throws NullPointerException{
	    String param = "";
	    for (int i=0; i<a_InputParams.size(); i++){
	        param += escapeParam((String)a_InputParams.get(i));
	        if(i<a_InputParams.size()-1)
	            param += ",";
	    }
	    return param;
	}

	public static String escapeParam(String a_InputParam){
	    String param = "";
	    if(a_InputParam==null || a_InputParam.trim().length()==0)
	        param = "";
	    else{
	        System.out.println(a_InputParam.indexOf(","));
	        System.out.println(a_InputParam.replaceAll(",", "\\\\,"));
	        param = a_InputParam.replaceAll(",", "\\\\,");
	    }
	    return param;
	}
	
	public static Vector<String> unescapeParam(String a_Param){
	    int fromIndex = 0;
	    int lastIndex = 0;
	    int index = 0;
	    int length = a_Param.length();
	    Vector<String> unescaped = new Vector<String>();
	    if(length>0){
		    while (fromIndex <=length){
		        index = a_Param.indexOf(',', fromIndex);
		        if(index ==-1){
		            unescaped.add(a_Param.substring(lastIndex, length).replaceAll("\\\\,", ",").trim());
		            break;
		        }            
		        if(index>0 && a_Param.charAt(index-1)== '\\'){
		            fromIndex = index+1;
		        }
		        else{
		            unescaped.add(a_Param.substring(lastIndex, index).replaceAll("\\,", ","));
		            lastIndex = index +1;
		            fromIndex = index +1;
		        }
		        
		    }
		    return unescaped;
	    }
	    else 
	        return new Vector<String>(0);
	}

	public static boolean containSpecialChar(String a_String)
	{
		char[] chars = a_String.toCharArray();
		for (int i=0;i<chars.length;i++)
		{
			if (chars[i]<48)
			{
				return true;
			}
		}
		return false;
	}
}