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index.html
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index.html
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<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>Check Direction</title>
</head>
<body>
<form name="edit" method="post" action="">
<textarea name="text" cols="70" rows="10" id="text" placeholder="Type RTL text here. ie: Arabic"></textarea>
</form>
<script type="text/javascript">
function isRTL(s){
var ltrChars = 'A-Za-z\u00C0-\u00D6\u00D8-\u00F6\u00F8-\u02B8\u0300-\u0590\u0800-\u1FFF'+'\u2C00-\uFB1C\uFDFE-\uFE6F\uFEFD-\uFFFF',
rtlChars = '\u0591-\u07FF\uFB1D-\uFDFD\uFE70-\uFEFC';
var ltrDirCheck = new RegExp('['+ltrChars+']');
var rtlDirCheck = new RegExp('['+rtlChars+']');
var ltr = ltrDirCheck.test(s);
var rtl = rtlDirCheck.test(s);
if(rtl && !ltr)
return true;
return false;
};
function changeStyle(e)
{
var elm = e.target;
var str = elm.value;
if(isRTL(str))
{
elm.style.direction = 'rtl';
}
else
{
elm.style.direction = 'ltr';
}
}
document.getElementById('text').addEventListener('change', function(e){
changeStyle(e);
});
document.getElementById('text').addEventListener('keyup', function(e){
changeStyle(e);
});
document.getElementById('text').addEventListener('keydown', function(e){
changeStyle(e);
});
</script>
</body>
</html>