function mysql_safe_data($string) {
		$string = stripslashes($string);
		$string = str_replace("'", "''", $string);
		$string = str_replace("\\", "\\\\", $string);
		return $string;
	}   

 function highlight($string, $words_to_highlight, $delimiter=" ", $case=0,
		$left_string="<b span style=\"background-color: yellow;\">", $right_string="</b>") {  
  // This is so it highlights the first word. Each word in a textblock must be surrounded by
  // [^A-Za-z] in order to highlight whole words, and not subwords. 
		/* Filtering Process:
	 Replace statements take out all malicious chars that would break the
	 search part of a regular expression. Takes unwanted chars and only lets the chars:
	 [^-a-zA-Z0-9&] in. */  
  $list_of_words = eregi_replace("[^-a-zA-Z0-9&']", " ", $words_to_highlight);   
		// This portion of code is to take out single word characters.
  $list_array = explode(" ", $list_of_words);
  for($i=0; $i<sizeof($list_array); $i++) 
   if(strlen($list_array[$i]) == 1) 
	$list_array[$i] = "";  
  $list_of_words = implode(" ", $list_array); // Use space as delimiter
  $list_of_words = eregi_replace(" +", "|", $list_of_words); 
  // Make sure there aren't any pipes | around $list_of_words
  if($list_of_words{0}=="|")
   $list_of_words{0} = "";
  if($list_of_words{strlen($list_of_words)-1}=="|")
   $list_of_words{strlen($list_of_words)-1}="";  
  $list_of_words = "(".trim($list_of_words).")";
  if($case==0)
   return eregi_replace("$list_of_words", "$left_string"."\\1"."$right_string", $string); 
  else
   return ereg_replace("$list_of_words", "$left_string"."\\1"."$right_string", $string); 
 } // end function highlight