In the following drop-down menu, when a user selects operation No, I want the next drop-down menu displayed
<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>
If the user selects employee no, I want the last drop-down menu to be hidden and the following text field shown up:
<input type='text'>
What I did is I put the following script but it doesn't hide neither of the two elements:
function check(elem) {
document.getElementById('OperationType').disabled = !elem.selectedIndex;
}
It only disabled it. I want it to be invisible. Thanks
In the following drop-down menu, when a user selects operation No, I want the next drop-down menu displayed
<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>
If the user selects employee no, I want the last drop-down menu to be hidden and the following text field shown up:
<input type='text'>
What I did is I put the following script but it doesn't hide neither of the two elements:
function check(elem) {
document.getElementById('OperationType').disabled = !elem.selectedIndex;
}
It only disabled it. I want it to be invisible. Thanks
Share Improve this question asked Apr 7, 2013 at 8:23 NasserNasser 2,1406 gold badges35 silver badges58 bronze badges3 Answers
Reset to default 8Add a style="display: none" to your OperationNos select:
You do not need to pass this to check().
And modify your function to toggle this css property if "OpNo" is selected:
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";
}
}
Example: http://jsfiddle.net/2pna2/
Use this:-
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 code:-
<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>
Look at that:
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