머라카노?

function MKAutoLink( content ) {

  var regURL     = new RegExp("(http|https|ftp|telnet|news|irc)://([-/.a-zA-Z0-9_~#%$?&=:200-377()]+)", "gi");

  var regURL2    = /(^|[^\/])(www\.[\S]+(\b|$))/gim;

  var rep        = content.replace(regURL, "<span onclick=\"setWebView('$1://$2', 'link');\">$1://$2</span>").replace(regURL2, "<span onclick=\"setWebView('http://$2', 'link');\">http://$2</span>");

  var phoneRegex = /((\({0,1}(0|\+61){0,1}(\ |-){0,1}0{0,1}(2|4|3|7|8){0,1}\){0,1}(\ |-){0,1}[0-9]{2}(\ |-){0,1}[0-9]{2}(\ |-){0,1}[0-9]{1}(\ |-){0,1}[0-9]{5}))|((\({0,1}(0|\+61){0,1}(\ |-){0,1}0{0,1}(2|4|3|7|8){0,1}\){0,1}(\ |-){0,1}[0-9]{2}(\ |-){0,1}[0-9]{2}(\ |-){0,1}[0-9]{1}(\ |-){0,1}[0-9]{4}))|((\({0,1}(0|\+61){0,1}(\ |-){0,1}0{0,1}(2|4|3|7|8){0,1}\){0,1}(\ |-){0,1}[0-9]{3}(\ |-){0,1}[0-9]{3}(\ |-){0,1}[0-9]{1}(\ |-){0,1}[0-9]{4}))/g;

  rep = rep.replace( phoneRegex, "<span onclick=\"setWebView('$&', 'tel');\">$&</span>");

  return rep;

};

MKAutoLink( "010-1234-5678" );

/******

 * 이번달 마지막 일 구하기

 ******/

var date    = new Date();

var year    = date.getFullYear();

var month = date.getMonth() + 1;

var day     = date.getDate();

var last   = new Date( year, month ); 

     last   = new Date( last - 1 ); 

var lastD = last.getDate();

/******

 * 해당 월 마지막 일 구하기

 ******/

var last   = new Date( "2016", "11" ); 

     last   = new Date( last - 1 ); 

var lastD = last.getDate();

function MKGetParameter( parm ) {

  var url = window.location.href;

  var rtn = "";

  parm  = parm.replace( /[\[\]]/g, "\\$&" );

  var regex = new RegExp( "[?&]" + parm + "(=([^&#]*)|&|#|$)" ),

  var result = regex.exec( url );

  if( result != "" && result[2] != "" ) {

    rtn = decodeURIComponent( results[2].replace(/\+/g, " ") );

  };

  return rtn;

};

var $thisTitle = "                앞뒤 짜르기 정규표현식                ";

=======================================================

$thisTitle = $thisTitle.replace(/^\s*/, "");

$thisTitle = $thisTitle.replace(/\s*$/, "");

=======================================================

$thisTitle = $thisTitle.replace(/(^\s*)|(\s*$)/, "");

=======================================================

alert( $thisTitle );

$("textarea").on("input keyup paste", function(){

  var $this = $(this);

  var max  = 8;

  var lng   = $this.val().length;

  var bval = "";

  if(lng > max) {

    alert("Too much");

    bval = $this.val().substr(0, max);

    $this.get(0).blur(); // substr로 한글 삭제 될때 

    $this.val( bval );

    $this.get(0).focus(); // substr로 한글 삭제 될때 

  };

});

<textarea></textarea>

$(function(){

  $('textarea[maxlength]').keyup(function(event){

    var max = parseInt($(this).attr("maxlength"));

    if($(this).val().length > max){

      $(this).val($(this).val().substr(0, max));

        alert("글자수를 초과하였습니다\n이후 글자는 자동으로 삭제됩니다');

        return false;

      }

  });

})

<textarea maxlength="5"></textarea>

var date  = new Date();

var hour  = date.getHours();

var min   = date.getMinutes();

var sec   = date.getSeconds();

var msec = date.getMilliseconds();

var ar  = "0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ";

var result;

for(var i = 0; i < 6; i++) {

  result += ar.charAt(Math.floor(Math.random() * ar.length));

};

console.log( result );

자바스크립트 대문자 변경

var Str = "abc";

Str.toUpperCase();  // 대문자 변경

console.log( Str );

var Str = "ABC";

Str.toLowerCase();  // 대문자 변경

console.log( Str );