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jayson999
[专家分：0] 发布于 2007-01-26 11:30:00
请教高手下拉框的JavaScript问题,谢谢~ 有1系列不同类型的测试题目,要求
拉框选可选项ABCD,在下拉框选中B和C时,旁边的输入框disabled(不是不显示)
例如:选类型A/D时,可以输入,<input type=text name=QQ size=4 maxlength=4>
选类型B/C时,禁止输入,<input disabled type=text name=QQ size=4 maxlength=4>
该怎么写啊?
测试代码---
<html>
<script language=JavaScript type=text/javascript>
function chg()
{
var d=document.f1;
if (d.selectq.value == 0)
...???
else if (d.selectq.value == 1)
...???
else if (d.selectq.value == 2)
...???
d.submit();
}
</script>
<body>
<form name=f1 method=POST>
<table width=438 height=110><font size=3 color=#0099CC><b>
<td width=430 height=106>选择题</b><br><br><br>
<select name=selectq onchange=chg()>
<option value=0 selected>类型A
<option value=1>类型B
<option value=2>类型C
<option value=3>类型D
</select>
问题<input type=text name=QQ size=4 maxlength=4>
</table>
<input type=submit name=submit value=提交>
</form> </body> </html>
拉框选可选项ABCD,在下拉框选中B和C时,旁边的输入框disabled(不是不显示)
例如:选类型A/D时,可以输入,<input type=text name=QQ size=4 maxlength=4>
选类型B/C时,禁止输入,<input disabled type=text name=QQ size=4 maxlength=4>
该怎么写啊?
测试代码---
<html>
<script language=JavaScript type=text/javascript>
function chg()
{
var d=document.f1;
if (d.selectq.value == 0)
...???
else if (d.selectq.value == 1)
...???
else if (d.selectq.value == 2)
...???
d.submit();
}
</script>
<body>
<form name=f1 method=POST>
<table width=438 height=110><font size=3 color=#0099CC><b>
<td width=430 height=106>选择题</b><br><br><br>
<select name=selectq onchange=chg()>
<option value=0 selected>类型A
<option value=1>类型B
<option value=2>类型C
<option value=3>类型D
</select>
问题<input type=text name=QQ size=4 maxlength=4>
</table>
<input type=submit name=submit value=提交>
</form> </body> </html>
