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<html>
<head>
<title>aa</title>
<script type="text/javascript">
<!--
function selectchg(obj){ //¼¿·ºÆ®¹Ú½º ¼±Åýà ºÒ·ÁÁú ÇÔ¼ö
var frm = document.frm;
if(obj.value=="fish"){ //¹°°í±â ¼±ÅýÃ
  frm.select2.options.length =0; //±âÁ¸ ¿É¼ÇÀº ¸ðµÎ »èÁ¦
  frm.select2.options[0]= new Option("¼±ÅÃÇϼ¼¿ä",""); //ù¹ø° ¿É¼Ç »ý¼º

frm.select2.options[1]= new Option("ÂüÄ¡","1");//µÎ¹ø° ¿É¼Ç »ý¼º  
  frm.select2.options[2]= new Option("°íµî¾î","2");//¼¼¹ø° ¿É¼Ç »ý¼º  
}else if(obj.value=="fruit"){ //°úÀÏ ¼±ÅÃ
  frm.select2.options.length =0;
  frm.select2.options[0]= new Option("¼±ÅÃÇϼ¼¿ä","");
  frm.select2.options[1]= new Option("»ç°ú","1");
  frm.select2.options[2]= new Option("¹è","2");
}else{  
  frm.select2.options.length =0;
  frm.select2.options[0]= new Option("¼±ÅÃÇϼ¼¿ä","");
}
}

-->
</script>
</head>
<body>
<form name="frm">
<select name="select1" onchange="selectchg(this)">
<option value="">¼±ÅÃÇϼ¼¿ä</option>
<option value="fish">¹°°í±â</option>
<option value="fruit">°úÀÏ</option>
</select>
<select name="select2">
<option value="">¼±ÅÃÇϼ¼¿ä</option>
</select>
</form>
</table>
</body>
</html>
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