//replace字串(同asp用法)
function replaceString (s,s1,s2) {

	 if (s.length == 0 || s1.length == 0)
	  return s;
	 
	 // process head
	 if (s.indexOf(s1) == 0) 
	  s = s2 + s.substr(s1.length, s.length - s1.length); 
	 
	 // process tail
	 if (s.lastIndexOf(s1) == s.length - s2.length)
	  s = s.substr(0, s.length - s1.length) + s2;
	 
	 // process middle 
	 var arrS = s.split(s1);
	 
	 if (arrS.length == 1)
	  return s;
	 
	 var result = ""; 
	 var nLen = arrS.length;
	 for (i=0 ; i < nLen ; i++) {
	     result +=  arrS [i];
	     
	     if (i != nLen - 1)
	      result += s2;
	    }
    
   return result;
}

//去掉空白
function trim(s) {
	s += "";
		
	if (s.length == 0)
		return s;
   
	var b = 0;
	var e = s.length - 1;
	
	while (s.substr(b, 1) == " " && b < s.length - 1) b++;
	while (s.substr(e, 1) == " " && e != 0) e--;
	
	if (b == s.length) // all blank
	return "";
	
	return s.substr(b, e- b + 1);
}


/*********************************************************************************************
' Purpose : 將url依照 DJ規則編碼
'			"{" --> "??" , "}" --> "==" , "Z" --> "^" , "." --> "]" , "_" --> "[" , "/" --> "$" ,
'			"?" --> "{" , "=" --> "}" , "&" --> "!"
' Param:
'  sURL : 傳入 url
' Return:
'  sURL : 編碼過的 
'*********************************************************************************************/

function DJEnCode(sURL)
{
	if (sURL == "") return sURL;
	sURL = sURL.toUpperCase();
	sURL = replaceString(replaceString(sURL ,"{", "??"), "}" , "==");
	sURL = replaceString(replaceString(replaceString(replaceString(replaceString(replaceString(replaceString(sURL ,"Z", "^"), "." , "]"), "_" , "["), "/" , "$"),"?","{"),"=","}"),"&","!");
	
	return sURL;
}


/*********************************************************************************************
' Purpose : 將url依照 DJ規則解碼
' Param:
'  sURL : 傳入編碼 url
' Return:
'  sURL : 解碼過的 
'*********************************************************************************************/

function DJDeCode(sURL)
{
	if (sURL == "") return sURL;
	sURL = sURL.toUpperCase();
	sURL = replaceString(replaceString(replaceString(replaceString(replaceString(replaceString(replaceString(sURL ,"^", "Z"), "]" , "."), "[" , "_"), "$" , "/"),"{","?"),"}","="),"!","&");
	sURL = replaceString(replaceString(sURL ,"??", "{"), "==" , "}");
	
	return sURL;
}