javascript - Issue with .toISOString() function -


consider following code html + javascript:

<!doctype html> <html> <body>  <p id="demo">click button display date after changing hours, minutes, , seconds.</p>  <button onclick="myfunction()">try it</button>  <script>  function myfunction()   {   var d = new date();   d.sethours(0,0,0,0);   document.write(d + '<br/>');   document.write('iso date '+ d.toisostring() + '<br/>');   //i want 2013-04-17t00:00:00.000z   }  </script> </body> </html>

output:

thu apr 18 2013 00:00:00 gmt+0530 (india standard time) iso date 2013-04-17t18:30:00.000z

could on understanding difference in date & time

var d = new date(); d.sethours(-12, d.gettimezoneoffset(), 0, 0); //removing timezone offset , 12 hours console.log(d.toisostring()); //2013-04-17t00:00:00.000z

i don't know, why need iso date day earlier, in case typo:

var d = new date(); d.sethours(0, -d.gettimezoneoffset(), 0, 0); //removing timezone offset. console.log(d.toisostring()); //2013-04-18t00:00:00.000z

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