4

在下面的下拉菜单中,当用户选择操作否时,我希望显示下一个下拉菜单

<select id="OperationType" onChange="check(this);">
 <option value="OpNo">Operation No</option>
 <option value="OpEmp">Employee No</option>
</select>

<select id=OperationNos>
 <option value="1001">1001</option>
 <option value="1002">1002</option>
</select>

如果用户选择员工编号,我希望隐藏最后一个下拉菜单并显示以下文本字段:

<input type='text'>

我所做的是我放置了以下脚本,但它并没有隐藏这两个元素:

function check(elem) {
    document.getElementById('OperationType').disabled = !elem.selectedIndex;
}

它只是禁用了它。我希望它是隐形的。谢谢

4

3 回答 3

8

添加 style="display: none" 到您的 OperationNos 选择:

您不需要传递this给 check()。

如果选择了“OpNo”,则修改您的函数以切换此 css 属性:

function check() {
    var dropdown = document.getElementById("OperationType");
    var current_value = dropdown.options[dropdown.selectedIndex].value;

    if (current_value == "OpNo") {
        document.getElementById("OperationNos").style.display = "block";
    }
    else {
        document.getElementById("OperationNos").style.display = "none";
    }
}

示例:http: //jsfiddle.net/2pna2/

于 2013-04-07T08:30:47.043 回答
2

用这个:-

function hideshow()
{
var s1= document.getElementById('OperationType');
var s2= document.getElementById('OperationNos');

if( s1.options[s1.selectedIndex].text=="Operation No")
{
s2.style.visibility = 'visible';
document.getElementById('t1').style.visibility = 'hidden';
}
if( s1.options[s1.selectedIndex].text=="Employee No")
{
s2.style.visibility = 'hidden';
document.getElementById('t1').style.visibility = 'visible';
}
}
function hide()

{

document.getElementById('t1').style.visibility = 'hidden';
}

html代码:-

<body onload="hide()">

<select id="OperationType" onChange="hideshow()">
 <option value="OpNo">Operation No</option>
 <option value="OpEmp">Employee No</option>
</select>

<select id="OperationNos">
 <option value="1001">1001</option>
 <option value="1002">1002</option>
</select>

<input type="text" id="t1" />
</body>
于 2013-04-07T08:32:59.583 回答
1

看那个:

var ot = document.getElementById('OperationType');
ot.disabled = !elem.selectedIndex;
ot.style.display = 'none'; // not rendered
//ot.style.visisbility = 'hidden'; // rendered but just invisble it's there
于 2013-04-07T08:29:10.187 回答