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check if Greek letters exist

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			$(function() {

				//button click
				$('#btn').on('click', function(e) {
					if($("#test").val().match( /[Α-Ωα-ωάίόύήώέ]/i )) {
						alert("Greek characters not allowed!")
						return false;
					}
					else 
						return true;
				});

			});

		<button id="btn">
			Test Greek identification
		</button>

		<input id="test">

<div id="myDIV"></div>  

origin - http://www.pipiscrew.com/?p=3939 js-check-if-greek-letters-exist

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