var Base64 = {  
    // 转码表  
    table : [  
            '0', '1', '2', '3', '4','5', '6', '7',
            '8', '9', '-', 'a', 'b', 'c', 'd', 'e',
            'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm',
            'n', 'o', 'p', 'q', 'r', 's', 't', 'u',
            'v', 'w', 'x', 'y', 'z', '_', 'A', 'B',
            'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J',
            'K', 'L', 'M', 'N', 'O' ,'P', 'Q', 'R',
            'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z'
    ],  
    UTF16ToUTF8 : function(str) {  
        var res = [], len = str.length;  
        for (var i = 0; i < len; i++) {  
            var code = str.charCodeAt(i);  
            if (code > 0x0000 && code <= 0x007F) {  
                // 单字节，这里并不考虑0x0000，因为它是空字节  
                // U+00000000 – U+0000007F  0xxxxxxx  
                res.push(str.charAt(i));  
            } else if (code >= 0x0080 && code <= 0x07FF) {  
                // 双字节  
                // U+00000080 – U+000007FF  110xxxxx 10xxxxxx  
                // 110xxxxx  
                var byte1 = 0xC0 | ((code >> 6) & 0x1F);  
                // 10xxxxxx  
                var byte2 = 0x80 | (code & 0x3F);  
                res.push(  
                    String.fromCharCode(byte1),   
                    String.fromCharCode(byte2)  
                );  
            } else if (code >= 0x0800 && code <= 0xFFFF) {  
                // 三字节  
                // U+00000800 – U+0000FFFF  1110xxxx 10xxxxxx 10xxxxxx  
                // 1110xxxx  
                var byte1 = 0xE0 | ((code >> 12) & 0x0F);  
                // 10xxxxxx  
                var byte2 = 0x80 | ((code >> 6) & 0x3F);  
                // 10xxxxxx  
                var byte3 = 0x80 | (code & 0x3F);  
                res.push(  
                    String.fromCharCode(byte1),   
                    String.fromCharCode(byte2),   
                    String.fromCharCode(byte3)  
                );  
            } else if (code >= 0x00010000 && code <= 0x001FFFFF) {  
                // 四字节  
                // U+00010000 – U+001FFFFF  11110xxx 10xxxxxx 10xxxxxx 10xxxxxx  
            } else if (code >= 0x00200000 && code <= 0x03FFFFFF) {  
                // 五字节  
                // U+00200000 – U+03FFFFFF  111110xx 10xxxxxx 10xxxxxx 10xxxxxx 10xxxxxx  
            } else /** if (code >= 0x04000000 && code <= 0x7FFFFFFF)*/ {  
                // 六字节  
                // U+04000000 – U+7FFFFFFF  1111110x 10xxxxxx 10xxxxxx 10xxxxxx 10xxxxxx 10xxxxxx  
            }  
        }  
 
        return res.join('');  
    },  
    UTF8ToUTF16 : function(str) {  
        var res = [], len = str.length;  
        var i = 0;  
        for (var i = 0; i < len; i++) {  
            var code = str.charCodeAt(i);  
            // 对第一个字节进行判断  
            if (((code >> 7) & 0xFF) == 0x0) {  
                // 单字节  
                // 0xxxxxxx  
                res.push(str.charAt(i));  
            } else if (((code >> 5) & 0xFF) == 0x6) {  
                // 双字节  
                // 110xxxxx 10xxxxxx  
                var code2 = str.charCodeAt(++i);  
                var byte1 = (code & 0x1F) << 6;  
                var byte2 = code2 & 0x3F;  
                var utf16 = byte1 | byte2;  
                res.push(Sting.fromCharCode(utf16));  
            } else if (((code >> 4) & 0xFF) == 0xE) {  
                // 三字节  
                // 1110xxxx 10xxxxxx 10xxxxxx  
                var code2 = str.charCodeAt(++i);  
                var code3 = str.charCodeAt(++i);  
                var byte1 = (code << 4) | ((code2 >> 2) & 0x0F);  
                var byte2 = ((code2 & 0x03) << 6) | (code3 & 0x3F);  
                utf16 = ((byte1 & 0x00FF) << 8) | byte2  
                res.push(String.fromCharCode(utf16));  
            } else if (((code >> 3) & 0xFF) == 0x1E) {  
                // 四字节  
                // 11110xxx 10xxxxxx 10xxxxxx 10xxxxxx  
            } else if (((code >> 2) & 0xFF) == 0x3E) {  
                // 五字节  
                // 111110xx 10xxxxxx 10xxxxxx 10xxxxxx 10xxxxxx  
            } else /** if (((code >> 1) & 0xFF) == 0x7E)*/ {  
                // 六字节  
                // 1111110x 10xxxxxx 10xxxxxx 10xxxxxx 10xxxxxx 10xxxxxx  
            }  
        }  
 
        return res.join('');  
    },  
    encode : function(str) {  
        if (!str) {  
            return '';  
        }  
        var utf8    = this.UTF16ToUTF8(str); // 转成UTF8  
        var i = 0; // 遍历索引  
        var len = utf8.length;  
        var res = [];  
        while (i < len) {  
            var c1 = utf8.charCodeAt(i++) & 0xFF;  
            res.push(this.table[c1 >> 2]);  
            // 需要补2个=  
            if (i == len) {  
                res.push(this.table[(c1 & 0x3) << 4]);  
                res.push('==');  
                break;  
            }  
            var c2 = utf8.charCodeAt(i++);  
            // 需要补1个=  
            if (i == len) {  
                res.push(this.table[((c1 & 0x3) << 4) | ((c2 >> 4) & 0x0F)]);  
                res.push(this.table[(c2 & 0x0F) << 2]);  
                res.push('=');  
                break;  
            }  
            var c3 = utf8.charCodeAt(i++);  
            res.push(this.table[((c1 & 0x3) << 4) | ((c2 >> 4) & 0x0F)]);  
            res.push(this.table[((c2 & 0x0F) << 2) | ((c3 & 0xC0) >> 6)]);  
            res.push(this.table[c3 & 0x3F]);  
        }  
 
        return res.join('');  
    },  
    decode : function(str) {  
        if (!str) {  
            return '';  
        }  
 
        var len = str.length;  
        var i   = 0;  
        var res = [];  
 
        while (i < len) {  
            code1 = this.table.indexOf(str.charAt(i++));  
            code2 = this.table.indexOf(str.charAt(i++));  
            code3 = this.table.indexOf(str.charAt(i++));  
            code4 = this.table.indexOf(str.charAt(i++));  
 
            c1 = (code1 << 2) | (code2 >> 4);  
            c2 = ((code2 & 0xF) << 4) | (code3 >> 2);  
            c3 = ((code3 & 0x3) << 6) | code4;  
 
            res.push(String.fromCharCode(c1));  
 
            if (code3 != 64) {  
                res.push(String.fromCharCode(c2));  
            }  
            if (code4 != 64) {  
                res.push(String.fromCharCode(c3));  
            }  
 
        }  
 
        return this.UTF8ToUTF16(res.join(''));  
    }  
};
 function encodeBase64(temp){
	if(temp){
		temp=temp.toString();
	}else{
		temp="";
	}
	return Base64.encode(temp);
}
//对提交的form表单数据加密
//fId:要加密的表单id
//sfId:要提交隐藏的表单id
 function base64Form(fId,sfId){
	var values;//接收表单数据
	var tempvalue;
	var index;
	var fhtml = '';
	var timestamp=$("#"+sfId).attr("data-timestamp");
	var nowTime = new Date().getTime();
	var msg;
	if((fId==sfId&&timestamp)||(fId!=sfId&&timestamp&&(nowTime-timestamp)<200)){
		msg="操作过于频繁，稍后再试";
		if(top.layer){
			top.layer.msg(msg);
		}else{
			alert(msg);
		}
		return;
	}else{
		$("#"+sfId).attr("data-timestamp",nowTime);
		values = $('#'+fId).serializeArray();
		for (index = 0; index < values.length; index++){
			tempvalue   = encodeBase64(values[index].value);
		    fhtml +='<input type="hidden" name="'+values[index].name+'" value="'+tempvalue+'"/>'
		}
		$('#'+sfId).html(fhtml);
	}
}