<select id="s1" onChange="if(this.options[this.selectedIndex].text=='1') document.getElementById('s2').disabled=true;else document.getElementById('s2').disabled=false;">
<option>1</option>
<option>2</option>
</select> <select id="s2" disabled>
<option>tt</option>
<option>rr</option>
</select>
<option>1</option>
<option>2</option>
</select> <select id="s2" disabled>
<option>tt</option>
<option>rr</option>
</select>
解决方案 »
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