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<html>
<body>
<select id="mySelect" size=5>
<option id="o1">1</option>
<option id="o2">2</option>
<option id="o3">3</option>
<option id="o4">4</option>
<option id="o5">5</option>
</select>
<input type="button" value="1" onClick="function1(o1);">
<input type="button" value="2" onClick="function1(o2);">
<input type="button" value="3" onClick="function1(o3);">
<input type="button" value="4" onClick="function1(o4);">
<input type="button" value="5" onClick="function1(o5);">
<script language="JavaScript">
function function1(elem) {
alert("Index: "+ elem.index);
}
</script>
</body>
</html>
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