`
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select multiple 动态实现

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<html>
	<head>
		<script language="JavaScript">
		<!--
			function moveOptions(objPush,objGet) {

				
				for (var i=0;i<objPush.length;i++) {
					if (objPush.options[i].selected) {
							var pushOpt = objPush.options[i];
							objGet.options.add(new Option(pushOpt.innerText, pushOpt.value));
							objPush.remove(i);
							
							i = i - 1;
					}
				}
				
			}
			
			function lookValue(objId) {
				var obj = document.getElementById(objId);
				for (var i=0;i<obj.length;i++) {
					if (obj.options[i].selected) {
							alert('value:'+obj.options[i].value);
							alert('description:'+obj.options[i].innerText);
					}
				}
			}
			
		//-->
		</script>
	</head>
	<body>
		<table>
				<tr>
					<td>
						<select multiple id="goObj" name="goObj" size="10">
							<option value="A">XHTML</option>
							<option value="B">CSS</option>
							<option value="C">JAVASCRIPT</option>
							<option value="D">XML</option>
							<option value="E">PHP</option>
							<option value="F">C#</option>
							<option value="G">JAVA</option>
							<option value="H">C++</option>
							<option value="I">PERL</option>
						</select>
					</td>
					<td>
						<input type="button" onclick="moveOptions(document.getElementById('goObj'),document.getElementById('backObj'))" value=">>"/>
						<input type="button" onclick="moveOptions(document.getElementById('backObj'),document.getElementById('goObj'))" value="<<"/>
					</td>
					<td>
						<select multiple id="backObj" name="backObj" size="10" >
						</select>
					</td>
					
				</tr>
				<tr>
					<td colspan="3">
						<input type="button" onclick="lookValue('goObj')" value="submit"/>
					</td>
				</tr>	
		</table>
		
	</body>
</html>
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