select multiple 动态实现
<html><head><script language="JavaScript"><!--function moveOptions(objPush,objGet) {for (var i=0;i<objPush.length;i++) {if (objPush.options.selected) {var pushOpt = objPush.options;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.selected) {alert('value:'+obj.options.value);alert('description:'+obj.options.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"value=">>"/><input type="button"value="<<"/></td><td><select multiple id="backObj" name="backObj" size="10" ></select></td></tr><tr><td colspan="3"><input type="button"value="submit"/></td></tr></table></body></html>
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