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JavaScriptµÄBASE64

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* ÎÒÔÚÍøÉÏ¿´µ½¹ýºÜ¶àBASE64µÄJavaScriptËã·¨£¬¶¼¾õµÃ²»ÂúÒ⣬ÓÚÊÇ×Ô¼ºÐ´ÁËÒ»¸ö£¬ÔÚÕâÀï·ÖÏíһϡ£
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* Èç¹û´ó¼ÒÓÐʲô²»¶®µÄµØ·½¿ÉÒÔÎÊÎÒ¡£
*/
var BASE64={
    /**
     * ´Ë±äÁ¿Îª±àÂëµÄkey£¬Ã¿¸ö×Ö·ûµÄϱêÏà¶ÔÓ¦ÓÚËüËù´ú±íµÄ±àÂë¡£
     */
    enKey: 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/',
    /**
     * ´Ë±äÁ¿Îª½âÂëµÄkey£¬ÊÇÒ»¸öÊý×飬BASE64µÄ×Ö·ûµÄASCIIÖµ×öϱ꣬Ëù¶ÔÓ¦µÄ¾ÍÊǸÃ×Ö·ûËù´ú±íµÄ±àÂëÖµ¡£
     */
    deKey: new Array(
        -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
        -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
        -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 62, -1, -1, -1, 63,
        52, 53, 54, 55, 56, 57, 58, 59, 60, 61, -1, -1, -1, -1, -1, -1,
        -1,  0,  1,  2,  3,  4,  5,  6,  7,  8,  9, 10, 11, 12, 13, 14,
        15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, -1, -1, -1, -1, -1,
        -1, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40,
        41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, -1, -1, -1, -1, -1
    ),
    /**
     * ±àÂë
     */
    encode: function(src){
        //ÓÃÒ»¸öÊý×éÀ´´æ·Å±àÂëºóµÄ×Ö·û£¬Ð§ÂʱÈÓÃ×Ö·û´®Ïà¼Ó¸ßºÜ¶à¡£
    


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