;(function($) {
		  var multipleSupport = typeof $('<input/>')[0].multiple !== 'undefined',
		      isIE = /msie/i.test( navigator.userAgent );
		  $.fn.customFile = function() {
		    return this.each(function() {
		      var $file = $(this).addClass('custom-file-upload-hidden'),
		          $wrap = $('<div class="file-upload-wrapper">'),
				  $button = $('<button type="button" class="file-upload-button">เลือกไฟล์</button>'),
		          $input = $('<input type="text" class="file-upload-input" disabled />'),
		          
		          $label = $('<label class="file-upload-button" for="'+ $file[0].id +'">Select a File</label>');
		      $file.css({
		        position: 'absolute',
		        left: '-9999px'
		      });
		      $wrap.insertAfter( $file )
		        .append( $file, ( isIE ? $label : $button ) , $input);
				$button.attr('tabIndex', -1);
		      $file.attr('tabIndex', -1);
		      
		      $button.click(function () {
		        $file.focus().click();
		      });
		      $file.change(function() {
		        var files = [], fileArr, filename;
		        if ( multipleSupport ) {
		          fileArr = $file[0].files;
		          for ( var i = 0, len = fileArr.length; i < len; i++ ) {
		            files.push( fileArr[i].name );
		          }
		          filename = files.join(', ');
		        } else {
		          filename = $file.val().split('\\').pop();
		        }
		        $input.val( filename )
		          .attr('title', filename)
		          .focus();

		      });
		      $input.on({
		        blur: function() { $file.trigger('blur'); },
		        keydown: function( e ) {
		          if ( e.which === 13 ) { // Enter
		            if ( !isIE ) { $file.trigger('click'); }
		          } else if ( e.which === 8 || e.which === 46 ) {
		            $file.replaceWith( $file = $file.clone( true ) );
		            $file.trigger('change');
		            $input.val('');
		          } else if ( e.which === 9 ){
		            return;
		          } else {
		            return false;
		          }
		        }
		      });

		    });

		  };

		  if ( !multipleSupport ) {
		    $( document ).on('change', 'input.customfile', function() {

		      var $this = $(this),
		          uniqId = 'customfile_'+ (new Date()).getTime(),
		          $wrap = $this.parent(),
		          $inputs = $wrap.siblings().find('.file-upload-input')
		            .filter(function(){ return !this.value }),
		          $file = $('<input type="file" id="'+ uniqId +'" name="'+ $this.attr('name') +'"/>* สามารถเลือกได้มากกว่า 1 ไฟล์ ขนาดไฟล์ไม่เกิน 20MB');
		      setTimeout(function() {
		        if ( $this.val() ) {
		          if ( !$inputs.length ) {
		            $wrap.after( $file );
		            $file.customFile();
		          }
		        } else {
		          $inputs.parent().remove();
		          $wrap.appendTo( $wrap.parent() );
		          $wrap.find('input').focus();
		        }
		      }, 1);

		    });
		  }
}(jQuery));
$('input[type=file]').customFile();