head사이에----------------------------------

<script language="JavaScript">
<!--
function MM_jumpMenu(targ,selObj,restore){ //v3.0
eval(targ+".location='"+selObj.options[selObj.selectedIndex].value+"'");
if (restore) selObj.selectedIndex=0;
}
//-->
</script>

body 밑에 --------------------
<form name="form1">
<select name="menu1" onChange="MM_jumpMenu('parent.frames[\'hot\']',this,0)">
<option selected>선택하세요</option>
<option value="http://www.freecount.ne">프리카운터</option>
</select>
</form>
<iframe src="test.htm" width=600 height=450 name=hot></iframe>