// added support for cyrrilic unicode symbols, which are converted into Windows-1251 charset

function URLEncode(s)
{
	// The Javascript escape and unescape functions do not correspond
	// with what browsers actually do...
	var SAFECHARS = "0123456789" +					// Numeric
					"ABCDEFGHIJKLMNOPQRSTUVWXYZ" +	// Alphabetic
					"abcdefghijklmnopqrstuvwxyz" +
					"-_.!~*'()";					// RFC2396 Mark characters
	var HEX = "0123456789ABCDEF";
	//   plaintext = document.URLForm.F1.value;
	var plaintext = s;
	var encoded = "";
	for (var i = 0; i < plaintext.length; i++ ) {
		var ch = plaintext.charAt(i);
	    if (ch == " ") {
		    encoded += "+";				// x-www-urlencoded, rather than %20
		} else if (SAFECHARS.indexOf(ch) != -1) {
		    encoded += ch;
		} else {
		    var charCode = ch.charCodeAt(0);
			if (charCode > 255) {
				
				if ((charCode >= 1040) && (charCode <= 1103)) {
					charCode -= 848;
				} else if (charCode == 1110) { 
					charCode = 179;
				} else if (charCode == 1108) { 
					charCode = 186;
				} else if (charCode == 1111) { 
					charCode = 191;
				} else if (charCode == 1030) { 
					charCode = 178;
				} else if (charCode == 1028) { 
					charCode = 170;
				} else if (charCode == 1031) { 
					charCode = 175;
				} else if (charCode == 8217) { 
					charCode = 146;
				} else if (charCode == 8211) { 
					charCode = 150;
				} else if (charCode == 8220) { 
					charCode = 147;
				} else if (charCode == 8221) { 
					charCode = 148;
				} else {
					//alert( "Unicode Character '" + ch + "' - (" + charCode + "), " + "cannot be encoded using standard URL encoding.\n" +
					//	"(URL encoding only supports 8-bit characters.)\n" +
					//	"A space (+) will be substituted." );
					encoded += "+";
					charCode =-1;
				}
			}

			if (charCode != -1) {
				encoded += "%";
				encoded += HEX.charAt((charCode >> 4) & 0xF);
				encoded += HEX.charAt(charCode & 0xF);
			}
		}
	} // for
	//document.URLForm.F2.value = encoded;
	//return false;
	return encoded;
};