<select onchange="window.alert(this.options[this.selectedIndex].text)">
<option>mmmmmmmmm</option>
<option>nnnnnnnnn</option></select>
value :this.options[this.selectedIndex].value.............
<option>mmmmmmmmm</option>
<option>nnnnnnnnn</option></select>
value :this.options[this.selectedIndex].value.............
请写在js里
<form name="form1">
<select name="sel1">
<option>sel1</option>
<option>sel2</option>
</select>
</form>
<select id="mm">
<option>sel1</option>
<option>sel2</option>
</select>
<option>sel1</option>
<option>sel2</option>
</select>
selected=false;沒選中
for(var i=1;i<slt.options.length;i++) { //i=1为判定除第一个选择项外是否被选定
if(slt.options[i].selected==true) return true;
}