// 鐢熸垚鐣欒█楠岃瘉鐮
function change(){
    code=$("#codeimg");
    // 楠岃瘉鐮佺粍鎴愬簱
    var arrays=new Array('1','2','3','4','5','6','7','8','9','0','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');
    // 閲嶆柊鍒濆鍖栭獙璇佺爜
    codes='';
    for(var i = 0; i<4; i++){
        // 闅忔満鑾峰彇涓€涓暟缁勭殑涓嬫爣
        var r = parseInt(Math.random()*arrays.length);
        codes += arrays[r];
    }
    // 楠岃瘉鐮佹坊鍔犲埌input閲
    code.val(codes);
}
change();
code.click(change);
//鍗曞嚮楠岃瘉
$("#codesubmit").click(function(){
    var inputCode = $("#codeinput").val().toUpperCase(); //鍙栧緱杈撳叆鐨勯獙璇佺爜骞惰浆鍖栦负澶у啓
    console.log(inputCode);
    if(inputCode.length == 0) { //鑻ヨ緭鍏ョ殑楠岃瘉鐮侀暱搴︿负0
        alert("璇疯ˉ鍏呰〃鍗曞唴瀹?); //鍒欏脊鍑鸿杈撳叆楠岃瘉鐮
    }
    else if(inputCode!=codes.toUpperCase()) { //鑻ヨ緭鍏ョ殑楠岃瘉鐮佷笌浜х敓鐨勯獙璇佺爜涓嶄竴鑷存椂
        alert("楠岃瘉鐮佽緭鍏ラ敊璇紒璇烽噸鏂拌緭鍏?); //鍒欏脊鍑洪獙璇佺爜杈撳叆閿欒
        change(); //鍒锋柊楠岃瘉鐮
        $("#codeinput").val(""); //娓呯┖鏂囨湰妗
    }else { //杈撳叆姝ｇ‘鏃

    }
});