在下面的下拉菜单中,当用户选择操作号时,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'>
我所做的是我放下以下脚本,但它不会隐藏这两个元素:
function check(elem) {
document.getElementById('OperationType').disabled = !elem.selectedIndex;
}
它只禁用了它。我希望它是隐形的。 感谢
答案 0 :(得分:6)
将一个style =“display:none”添加到您的OperationNos中:
您无需将this
传递给check()。
如果选择“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";
}
}
答案 1 :(得分: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
答案 2 :(得分:1)
使用: -
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>