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HTML

              
                <!-- Created by SiamakMokhtari Twitter: @sia_mac. -->
<h1>Auto Direction <sup>(RTL|LTR)</sup></h1>
<h4>There is a trick with jQuery or Zepto.js that you can Change auto Direction of Inputs in forms.</h4>
<form action="#">
  <label for="input[1]">Write English Characters or Persian Characters:</label>
  <input type="text" id="input[1]" class="auto-direction" placeholder="Type Everyting..." />
</form>  
<hr />
<p>Created by <a href="https://twitter.com/sia_mac">Siamak Mokhtari</a>
  <br />
  <small>April 2014.</small>
</p>
              
            
!

CSS

              
                @import "compass/css3";

@import url(https://fonts.googleapis.com/css?family=Lato);
$bg:#efefef;
$color:#666;
$color_gray:#444;
$color_input:#525582;
$color_hover:#222;

html, body {height: 100%;padding: 0;}
*:focus{outline:none}
p{margin:0;}
html {
  font-size: 100%;
  -webkit-box-sizing: border-box;
  -moz-box-sizing: border-box;
  box-sizing: border-box;
}
body{
  padding:0;
  background:$bg;
  padding: 1em 0;
  color:$color;
  font-family: "Lato",Arial,Times,serif;
  line-height: 1.618;
  text-align:center;
}
a{
  color: $color_gray;
  text-decoration: none;
  border-bottom:.1em dotted $color_gray;
&:hover{border-bottom-color:$color_hover;color:$color_hover}
}
label{
  display: block;
  color:$color_gray;
  margin-top:2em;
  margin-bottom:.5em
}  
input{
  width: 15rem;
  display: block;
  font-size:.8rem;
  margin: .75em auto;
  color: $color_gray;
  background-color: #FEFEFE;
  border: .12rem solid $color_input;
  -webkit-box-shadow: inset 0 1px 1px rgba(0, 0, 0, 0.075);
  -moz-box-shadow: inset 0 1px 1px rgba(0, 0, 0, 0.075);
  box-shadow: inset 0 1px 1px rgba(0, 0, 0, 0.075);
  padding: .7rem .75rem;
  font-family: 'Lucida Sans Unicode','Lucida Grande',Tahoma,sans-serif;
  border-radius: .5em;
}
hr{
  width: 3rem;
  border: 0;
  height: .12rem;
  background-color: $color_gray;
  margin-top: 4rem;
}
              
            
!

JS

              
                /*!
 * Auto Direction. (RTL To LTR)
 * SiamakMokhtri(@sia_mac) at Fiction(@fictionteam) Under Licence MIT.
 * Created at April 2014.
 */
function isUnicode(str) {
	var letters = [];
	for (var i = 0; i <= str.length; i++) {
		letters[i] = str.substring((i - 1), i);
		if (letters[i].charCodeAt() > 255) { return true; }
	}
	return false;
}
var dir = $('input[type=text]');
dir.keyup(function(e) {
	if (isUnicode(dir.val())) {
		$(this).css('direction', 'rtl');
	}
	else {
		$(this).css('direction', 'ltr');
	}
}); 
              
            
!
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