记录两个编码方法

//使用“\”对特殊字符进行转义，除数字字母之外，小于127使用16进制“\xHH”的方式进行编码，大于用unicode（非常严格模式）。
var JavaScriptEncode = function(str){

var hex=new Array('0','1','2','3','4','5','6','7','8','9','a','b','c','d','e','f');

function changeTo16Hex(charCode){
    return "\\x" + charCode.charCodeAt(0).toString(16);
}

function encodeCharx(original) {

    var found = true;
    var thecharchar = original.charAt(0);
    var thechar = original.charCodeAt(0);
    switch(thecharchar) {
        case '\n': return "\\n"; break; //newline
        case '\r': return "\\r"; break; //Carriage return
        case '\'': return "\\'"; break;
        case '"': return "\\\""; break;
        case '\&': return "\\&"; break;
        case '\\': return "\\\\"; break;
        case '\t': return "\\t"; break;
        case '\b': return "\\b"; break;
        case '\f': return "\\f"; break;
        case '/': return "\\x2F"; break;
        case '<': return "\\x3C"; break;
        case '>': return "\\x3E"; break;
        default:
            found=false;
            break;
    }
    if(!found){
        if(thechar > 47 && thechar < 58){ //数字
            return original;
        }

        if(thechar > 64 && thechar < 91){ //大写字母
            return original;
        }

        if(thechar > 96 && thechar < 123){ //小写字母
            return original;
        }        

        if(thechar>127) { //大于127用unicode
            var c = thechar;
            var a4 = c%16;
            c = Math.floor(c/16); 
            var a3 = c%16;
            c = Math.floor(c/16);
            var a2 = c%16;
            c = Math.floor(c/16);
            var a1 = c%16;
            return "\\u"+hex[a1]+hex[a2]+hex[a3]+hex[a4]+"";        
        }
        else {
            return changeTo16Hex(original);
        }

    }
}     

var preescape = str;
var escaped = "";
var i=0;
for(i=0; i < preescape.length; i++){
    escaped = escaped + encodeCharx(preescape.charAt(i));
}
return escaped;

}

var HtmlEncode = function(str){
var hex = new Array(‘0’,’1’,’2’,’3’,’4’,’5’,’6’,’7’,’8’,’9’,’a’,’b’,’c’,’d’,’e’,’f’);
var preescape = str;
var escaped = “”;
for(var i = 0; i < preescape.length; i++){
var p = preescape.charAt(i);
escaped = escaped + escapeCharx(p);
}

return escaped;

function escapeCharx(original){
    var found=true;
    var thechar=original.charCodeAt(0);
    switch(thechar) {
        case 10: return "<br/>"; break; //newline
        case 32: return "&nbsp;"; break; //space
        case 34:return "&quot;"; break; //"
        case 38:return "&amp;"; break; //&
        case 39:return "&#x27;"; break; //'
        case 47:return "&#x2F;"; break; // /
        case 60:return "&lt;"; break; //<
        case 62:return "&gt;"; break; //>
        case 198:return "&AElig;"; break;
        case 193:return "&Aacute;"; break;
        case 194:return "&Acirc;"; break; 
        case 192:return "&Agrave;"; break; 
        case 197:return "&Aring;"; break; 
        case 195:return "&Atilde;"; break; 
        case 196:return "&Auml;"; break; 
        case 199:return "&Ccedil;"; break; 
        case 208:return "&ETH;"; break;
        case 201:return "&Eacute;"; break; 
        case 202:return "&Ecirc;"; break; 
        case 200:return "&Egrave;"; break; 
        case 203:return "&Euml;"; break;
        case 205:return "&Iacute;"; break;
        case 206:return "&Icirc;"; break; 
        case 204:return "&Igrave;"; break; 
        case 207:return "&Iuml;"; break;
        case 209:return "&Ntilde;"; break; 
        case 211:return "&Oacute;"; break;
        case 212:return "&Ocirc;"; break; 
        case 210:return "&Ograve;"; break; 
        case 216:return "&Oslash;"; break; 
        case 213:return "&Otilde;"; break; 
        case 214:return "&Ouml;"; break;
        case 222:return "&THORN;"; break; 
        case 218:return "&Uacute;"; break; 
        case 219:return "&Ucirc;"; break; 
        case 217:return "&Ugrave;"; break; 
        case 220:return "&Uuml;"; break; 
        case 221:return "&Yacute;"; break;
        case 225:return "&aacute;"; break; 
        case 226:return "&acirc;"; break; 
        case 230:return "&aelig;"; break; 
        case 224:return "&agrave;"; break; 
        case 229:return "&aring;"; break; 
        case 227:return "&atilde;"; break; 
        case 228:return "&auml;"; break; 
        case 231:return "&ccedil;"; break; 
        case 233:return "&eacute;"; break;
        case 234:return "&ecirc;"; break; 
        case 232:return "&egrave;"; break; 
        case 240:return "&eth;"; break; 
        case 235:return "&euml;"; break; 
        case 237:return "&iacute;"; break; 
        case 238:return "&icirc;"; break; 
        case 236:return "&igrave;"; break; 
        case 239:return "&iuml;"; break; 
        case 241:return "&ntilde;"; break; 
        case 243:return "&oacute;"; break;
        case 244:return "&ocirc;"; break; 
        case 242:return "&ograve;"; break; 
        case 248:return "&oslash;"; break; 
        case 245:return "&otilde;"; break;
        case 246:return "&ouml;"; break; 
        case 223:return "&szlig;"; break; 
        case 254:return "&thorn;"; break; 
        case 250:return "&uacute;"; break; 
        case 251:return "&ucirc;"; break; 
        case 249:return "&ugrave;"; break; 
        case 252:return "&uuml;"; break; 
        case 253:return "&yacute;"; break; 
        case 255:return "&yuml;"; break;
        case 162:return "&cent;"; break; 
        case '\r': break;
        default:
            found=false;
            break;
    }
    if(!found){
        if(thechar>127) {
            var c=thechar;
            var a4=c%16;
            c=Math.floor(c/16); 
            var a3=c%16;
            c=Math.floor(c/16);
            var a2=c%16;
            c=Math.floor(c/16);
            var a1=c%16;
            return "&#x"+hex[a1]+hex[a2]+hex[a3]+hex[a4]+";";        
        }
        else{
            return original;
        }
    }    
}

}