basic-javascript-programs/js18.html at master · AswaniPc/basic-javascript-programs · GitHub

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<!--Add and remove items between two multiple selection boxes -->
<!DOCTYPE html>
<html>
<head>
	<title>js18</title>
	<script type="text/javascript">

	function fremove()
	{
		x = document.getElementById("main");
		y=document.getElementById("selected");
		for (var i=0; i<=x.length; i++)
		{
		var option = document.createElement("option");
    	option.text = x.options[x.selectedIndex].value;
		x.remove(x.selectedIndex);
		y.add(option);
		}

	}
	function fadd()
	{
		x = document.getElementById("main");
		y=document.getElementById("selected");
		for (var i=0; i<=y.length; i++)
		{
		var option = document.createElement("option");
    	option.text = y.options[y.selectedIndex].value;
		y.remove(y.selectedIndex);
		x.add(option);
		}
	}

	</script>
</head>
<body>
<table>
<tr>
<td>
<select id="main" multiple size="8">
	<option selected disabled>select items</option>
	<option>a</option>
	<option>b</option>
	<option>c</option>
	<option>d</option>
	<option>e</option>
	<option>f</option>
	<option>g</option>
</select>
</td>
<td>
<select id="selected" multiple size="8">
	<option selected disabled>selected items</option>
</select>
</td>
<tr>
	<td>
		<button onclick="fremove();">add items to cart</button>

	</td>
	<td>
		<button onclick="fadd();">remove items from cart</button>
	</td>
</tr>
</table>
</body>
</html>