JavaScript calculates world full symmetry day

Today is the 2011-11-02 day, Weibo ah, g+ ah what is the world is completely symmetrical day, also said how many years of the encounter. Write a JavaScript applet below to see if it's really n-year. The calculation ranges from 2000 to 3,000 A.D. Lanxi County Quwan Home Photography

Noun Explanation: The world is completely symmetrical day, refers to the Gregorian calendar date in the dates of the full symmetry of the date, this day friends can send each other blessings at the same time to let everyone sigh of the precious times.

JavaScript Code:

<input type= "button" value= "Calculate World Full symmetry day" id= "compute"/><div id= "result" ></div> <script> /** * Change the date into a standard 8-bit format, such as 20111102 * divide it into four segments 20 11 11 02 for the century, year, month, day * time complexity of the algorithm is O (N3), and from the last four bits, the month and day can get the final knot More efficient * Because the February mantissa of the leap year is 9, which exceeds the long history of mankind, so there is no need to consider */;;(            function () {var thedatelist=[];            The century maximum Var maxforcentury=30 that appears palindrome day;            The century minimum var minforcentury=20 that appears palindrome day;            May appear palindrome day of the maximum value, here only rough processing Var maxforyear=21;                var maxforday=31;//does not exclude leap year for (Var i=1;i<=12;i++) {var stdyear,stdday;                var stdmonth=getstandarddate (i);                /* IF (getreversedate (stdmonth) >maxforday) {continue;                } */Maxforday=getdate (i);                    for (Var k=1;k<maxforday;k++) {Stdday =getstandarddate (k); Stdyear=getreverseDate (Stdmonth+stdday); if (parseint (Getreversedate (Stdday), ten) >=minforcentury && parseint (getreversedate (Stdday)                            , ten) <maxforcentury) Thedatelist.push (Stdyear+stdmonth+stdday)} } thedatelist.sort (); Sort var result = document.getElementById ("result"), var str = "", var btn = document.getElementById ("Compute"); Btn.onclick = function () {for (Var i=0;i<thedatelist.length;i++) {Console.log (thedatelist[i]); str + = Thedatelist[i]                        + "<br/>"; result.innerhtml = str;}}             Console.log (' Total%d records ', thedatelist.length)/** * Number of days of current month based on month * @param {int} val month            * @return {int} */function GetDate (val) {return val%2==0?30:31; /** * Replace a date value less than 10 with a standard 8-bit date value * @param {int} val month or date * @return {string} standard  Format */          Function Getstandarddate (val) {if (val<10) {return ' 0 ' +val;            } return val.tostring ();             /** * Reverse Date * @param {string} standard format for date month or date * @return {string} inverted standard format            */function Getreversedate (date) {return Date.split (""). Reverse (). Join ("");    }        })(); </script>

JavaScript calculates world full symmetry day