/**********************************************************************
 *** 	UTF-8 to UTF 16 Conversion                                    ***
 *** 	UTF-16 to UTF 8 Conversion                                    ***
 ***                                                                ***
 ***	Author:  Ansgar Schmidt; M.I.T newmedia                       ***
 ***	Updated: Guido Paschold, M.I.T newmedia                       ***
 ***	08.06.2005                                                    ***
 ***                                                                ***
 ***	Tested Browsers: IE 6.0:  OK                                  ***
 ***	                 NS 4.75: -  (Eingabe von UTF-16 String in    ***
 ***                                Test-Inputfield nicht moeglich   ***
 ***	                 NS 7.1:  OK                                  ***
 ***	                 FF 1.0:  nicht getestet                      ***
 ***	                 MZ 1.73: nicht getestet                      ***
 **********************************************************************/

function utf16to8(psStr) {
	// Argument: UTF-16 String
	var lsChar;
	var lsReturn = "";
	var liStrLen = psStr.length;
	for (var i=0; i<liStrLen; i++) {
		lsChar = psStr.charCodeAt(i);
		if ((lsChar >= 0x0001) && (lsChar <= 0x007F)) {
			lsReturn += psStr.charAt(i);
		} else if (lsChar > 0x07FF) {
			lsReturn += String.fromCharCode(0xE0 | ((lsChar >> 12) & 0x0F));
			lsReturn += String.fromCharCode(0x80 | ((lsChar >>  6) & 0x3F));
			lsReturn += String.fromCharCode(0x80 | ((lsChar >>  0) & 0x3F));
		} else {
			lsReturn += String.fromCharCode(0xC0 | ((lsChar >>  6) & 0x1F));
			lsReturn += String.fromCharCode(0x80 | ((lsChar >>  0) & 0x3F));
		}
	}
	// Return: UTF-8 String
	return lsReturn;
}

function utf8to16(psStr) {
	// Argument: UTF-8 String
	var lsChar, lsChar2, lsChar3;
	var lsReturn = "";
	var liStrLen = psStr.length;
	var i = 0;
	while(i < liStrLen) {
		lsChar = psStr.charCodeAt(i++);
		switch (lsChar >> 4) { 
			case 0: case 1: case 2: case 3: case 4: case 5: case 6: case 7:
				// 0xxxxxxx
				lsReturn += psStr.charAt(i-1);
				break;
			case 12: case 13:
				// 110x xxxx   10xx xxxx
				lsChar2 = psStr.charCodeAt(i++);
				lsReturn += String.fromCharCode(((lsChar & 0x1F) << 6) | (lsChar2 & 0x3F));
				break;
			case 14:
				// 1110 xxxx  10xx xxxx  10xx xxxx
				lsChar2 = psStr.charCodeAt(i++);
				lsChar3 = psStr.charCodeAt(i++);
				lsReturn += String.fromCharCode(((lsChar & 0x0F) << 12) | ((lsChar2 & 0x3F) << 6) |	((lsChar3 & 0x3F) << 0));
				break;
		}
	}
	// Return: UTF-16 String
	return lsReturn;
}