<input type="search" name="sn_id" id="sn_id" value="" class="frm_input frm_han_chk_input" size="30" placeholder="아이디">

$('input.frm_han_chk_input').on('blur keyup', function(e) {
	var sVlaue = $(this).val();
	sVlaue = sVlaue.replace( /[ㄱ-ㅎ|ㅏ-ㅣ|가-힣]/g, '' ); // 한글제거
	sVlaue = sVlaue.replace(/ /g, ''); // 모든 공백 제거
	$(this).val( sVlaue );
});