<form name="form1" method="post" action="">
<table width="42%" border="0" align="center">
<tr>
<td width="45%"><input name="a" type="text" id="a" value="1" size="10" onpropertychange="try{c.value=a.value*b.value}catch(e){}">
*</td>
<td width="39%"><input name="b" type="text" id="b" value="2" size="10" onpropertychange="try{c.value=a.value*b.value}catch(e){}">
=</td>
<td width="16%"><input name="c" type="text" id="c" value="2" size="10"></td>
</tr>
<tr>
<td><input name="a1" type="text" id="a1" value="1" size="10" onpropertychange="try{c1.value=a1.value*b1.value}catch(e){}">
*</td>
<td><input name="b1" type="text" id="b1" value="5" size="10" onpropertychange="try{c1.value=a1.value*b1.value}catch(e){}">
=</td>
<td><input name="c1" type="text" id="c1" value="5" size="10"></td>
</tr>
</table></form>
<table width="42%" border="0" align="center">
<tr>
<td width="45%"><input name="a" type="text" id="a" value="1" size="10" onpropertychange="try{c.value=a.value*b.value}catch(e){}">
*</td>
<td width="39%"><input name="b" type="text" id="b" value="2" size="10" onpropertychange="try{c.value=a.value*b.value}catch(e){}">
=</td>
<td width="16%"><input name="c" type="text" id="c" value="2" size="10"></td>
</tr>
<tr>
<td><input name="a1" type="text" id="a1" value="1" size="10" onpropertychange="try{c1.value=a1.value*b1.value}catch(e){}">
*</td>
<td><input name="b1" type="text" id="b1" value="5" size="10" onpropertychange="try{c1.value=a1.value*b1.value}catch(e){}">
=</td>
<td><input name="c1" type="text" id="c1" value="5" size="10"></td>
</tr>
</table></form>
解决方案 »
免费领取超大流量手机卡,每月29元包185G流量+100分钟通话, 中国电信官方发货