저자 마 지아난 <title> 새 문서 </title> <meta name="Author" content="majianan"> <form id="form1"> <table width="40%" align="center"> <tr> <td> <input type="button" value=" Up " id="btnUp" onclick="move(true);" style="width:65"> <input type="button" value=" Down " id="btnDowm" onclick="move(false);" style="width:65"> </td> <td> <select multiple id="leftSel" onclick="setButton(this)" style="height:200px;width:100px;"> <option value="1">Java</option> <option value="2">JavaScript</option> <option value="3">C </option> <option value="4">HTML</option> </select> </td> <td> <input type="button" value=" >> " id="btnRight" onclick="move(document.getElementById('leftSel'),document.getElementById('rightSel'));" style="width:65"> <input type="button" value=" << " id="btnLeft" onclick="move(document.getElementById('rightSel'),document.getElementById('leftSel'));" style="width:65"> </td> <td> <select multiple id="rightSel" onclick="setButton(this)" style="height:200px;width:100px;"> <option value="5">CSS</option> <option value="6">.Net</option> </select> </td> </tr> </table> </form> [Ctrl A 모두 선택 참고: 외부 J를 도입해야 하는 경우 실행하려면 새로 고쳐야 합니다 ] var currentSel = null; function move(){ if(arguments.length==1){ moveUp(arguments[0]); }else if(arguments.length==2){ moveRight(arguments[0],arguments[1]); } } function moveUp(direction){ if(currentSel == null) return; var index = currentSel.selectedIndex; if(direction){//up if(index==0) return; var value = currentSel.options[index-1].value; var text = currentSel.options[index-1].text; currentSel.options[index-1].value = currentSel.options[index].value; currentSel.options[index-1].text = currentSel.options[index].text; currentSel.options[index].value = value; currentSel.options[index].text = text; currentSel.options[index].selected = false; currentSel.options[index-1].selected = true; }else{//down if(index==(currentSel.length-1)) return; var value = currentSel.options[index+1].value; var text = currentSel.options[index+1].text; currentSel.options[index+1].value = currentSel.options[index].value; currentSel.options[index+1].text = currentSel.options[index].text; currentSel.options[index].value = value; currentSel.options[index].text = text; currentSel.options[index].selected = false; currentSel.options[index+1].selected = true; } } function moveRight(src,des){ if(src.selectedIndex==-1){ alert("Please select first!"); return; } for(var i=0;i<src.length;i++){ if(src[i].selected){ var op = document.createElement("option"); op.value = src.options[src.selectedIndex].value; op.text = src.options[src.selectedIndex].text; des.options.add(op); src.remove(i); i--; } } } function setButton(obj){ if(obj.length==0) return; currentSel = obj; if(obj.id=="leftSel"){ document.getElementById("btnLeft").disabled = true; document.getElementById("btnRight").disabled = false; reSelect(document.getElementById("rightSel")); }else{ document.getElementById("btnLeft").disabled = false; document.getElementById("btnRight").disabled = true; reSelect(document.getElementById("leftSel")); } } function reSelect(obj){ for(var i=0; i<obj.length; i++){ if(obj[i].selected) obj[i].selected = false; } }
![[웹 프런트엔드] Node.js 빠른 시작](https://img.php.cn/upload/course/000/000/067/662b5d34ba7c0227.png)
