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<form name="f1"><select name="s1"
onchange="chg(document.f1.s1,document.f1.s2)">
<option value="½Î÷">½Î÷</option>
<option value="¸£½¨">¸£½¨</option>
</select><select name="s2">
<option value="1">1</option>
</select></form>
<script>
//´´½¨¶ÔÏó£¬Êý¾Ý£¬Öµ£¬Îı¾
function obj(aData, aValue, aText) {
this.Data = aData;
this.Value = aValue;
this.Text = aText;
}
//ÉèÖÃÑ¡ÏîÊý¾ÝÊý×飬¿ÉÒÔÌí¼Ó¶à¸ö²ÎÊýΪ"Ô´µØÖ·,Ñ¡ÔñÖµ£¬Ñ¡ÔñÎı¾"
var Set_data = new Array(
new obj('½Î÷', 'Äϲý', 'Äϲý'),
new obj('½Î÷', '¾Å½','¾Å½'),
new obj('¸£½¨', '¸£ÖÝ', '¸£ÖÝ'),
new obj('¸£½¨', 'ÏÃÃÅ', 'ÏÃÃÅ'));
//¸Ãº¯Êý½ÓÊÜÁ½¸ö²ÎÊý——Á½¸öÏÂÀ²Ëµ¥
function chg(parent, child) {
//ÒÔ¸¸²Ëµ¥µÄÑ¡ÖÐÑ¡ÏîµÄÖµ£¬×Ӳ˵¥£¬ºÍÑ¡ÏîÊýÊý¾Ý×éΪ²ÎÊýµ÷ÓÃchgº¯Êý
chgComitem(parent.options[parent.selectedIndex].value, child, Set_data);
}
function chgComitem(parentValue, child, objs) {
//¸Ä±ä×Ӳ˵¥ //1.ÒÔ×Ӳ˵¥Îª²ÎÊýµ÷Óú¯Êý
DelAllComitem(child);
//2.±éÀúËùÓеÄÑ¡ÏîÊý¾Ý
for (i = 0; i < objs.length; i++) {
//Èç¹ûÑ¡ÏîÊý¾ÝµÄDataÓ븸²Ëµ¥Ñ¡ÖÐÖµÒ»ÑùµÄ»°
if (objs[i].Data == parentValue)
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var key2=222;
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