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input nameÀ» ¹è¿­·Î ¿©·¯°³ ÁöÁ¤Çϼŵµ µË´Ï´Ù <script language="JavaScript"> function chk_same() { var ff = document.planfrm; var shopnum = "shopnum[]"; var cnt = document.getElementsByName(shopnum); var totalCnt = 0; for(i=0;i<cnt.length;i++) { var chksame = cnt[i].value.split(","); } for(var j=0; j < chksame.length; j++) { var tmp = chksame[j]; for(var k=j+1; k <= chksame.length; k++) { if (tmp == chksame[k]) { alert('Áߺ¹ µÈ °ªÀÌ ÀÖ½À´Ï´Ù. È®ÀÎ ÇØ ÁÖ¼¼¿ä\nResult : '+chksame[k]); chkfocus(); return; } } } function chkfocus() { for(i=0;i<cnt.length;i++) { cnt[i].focus(); } } } </script> <form name="planfrm" method='post'> <input type='text' name='shopnum[]' size='30' onBlur='chk_same()'> </form>