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multiple_select.html
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multiple_select.html
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<html>
<head>
<script language="javascript">
function addToSecond()
{
var leftbox = document.getElementById("leftbox");
var selectedCountries = new Array();
var p;
var count = 0;
alert(leftbox.options.length);
for(p=0;p<leftbox.options.length;p++)
{
alert(p)
if(leftbox.options[p].selected==true)
{
alert("this is selected option");
//add option to right select box
var optn = document.createElement("OPTION");
optn.text = leftbox.options[p].value;
optn.value = leftbox.options[p].value;
rightbox.options.add(optn);
//remove option
leftbox.remove(p);
p=p-1;
}
}
}
function removeFromSecond()
{
var rightbox = document.getElementById("rightbox");
var selectedCountries = new Array();
var p;
var count = 0;
alert(rightbox.options.length);
for(p=0;p<rightbox.options.length;p++)
{
alert(p)
if(rightbox.options[p].selected==true)
{
alert("this is selected option");
//add option to left select box
var optn1 = document.createElement("OPTION");
optn1.text = rightbox.options[p].value;
optn1.value = rightbox.options[p].value;
leftbox.options.add(optn1);
//remove option
rightbox.remove(p);
p=p-1;
}
}
}
</script>
</head>
<body>
<table>
<tr>
<td>
<select multiple="multiple" size="5" id="leftbox">
<option value="Denmark">Denmark</option>
<option value="India">India</option>
<option value="USA">USA</option>
<option value="France">France</option>
<option value="Germany">Germany</option>
</select>
</td>
<td>
<input type="Button" value="Add" onClick="addToSecond()">
<input type="Button" value="Remove" onClick="removeFromSecond()">
</td>
<td>
<select multiple="multiple" size="5" id=rightbox>
</select>
</td>
</td>
</tr>
</table>
</body>
</html>