js는 code_form 특수 효과를 전달하는 다중 선택 목록 값을 선택합니다.

<title>js 선택</title> <form name="form1" method="post" action=""> <table border="0" align="center" width="75%" cellspacing="0" cellpadding="0"> <tr> <td> <table border="0" align="center"> <tr> <td> <select name="leftItem" style="width:200px" size="10" multiple> <option value="1">item1</option> <option value="2">item2</option> <option value="3">item3</option> <option value="4">item4</option> <option value="5">item5</option> </select> </td> </tr> </table> </td> <td> <table border="0" align="center"> <tr><td height="30"><input type="button" name="button1" style="width:50px" value=">" onclick="fMoveSelectedOptionsLeftToRight(document.all.leftItem,document.all.rightItem)"></td></tr> <tr><td height="30"><input type="button" name="button2" style="width:50px" value=">>" onclick="fMoveAllOptionsLeftToRight(document.all.leftItem,document.all.rightItem)"></td></tr> <tr> <td height="30"><input type="button" name="button3" style="width:50px" value="<" onClick="fMoveSelectedOptionsRightToLeft(document.all.leftItem,document.all.rightItem)"></td></tr> <tr><td height="30"><input type="button" name="button4" style="width:50px" value="<<" onClick="fMoveAllOptionsRightToLeft(document.all.leftItem,document.all.rightItem)"></td></tr> </table> <테이블 테두리="0" 정렬="중앙"> <tr><td height="30"><input type="button" name="button1" style="width:50px" value=">" onclick="fMoveSelectedOptionsLeftToRight(document.all.leftItem,document.all.rightItem)"></td> <td> </td> </tr> <tr> <td height="30"> <input type="button" name="button2" style="width:50px" value=">>" onclick="fMoveAllOptionsLeftToRight(document.all.leftItem,document.all.rightItem)"><table border="0" align="center"> <tr> <td> <select name="rightItem" style="width:200px" size="10" multiple> </select> </td> </tr> </table> </td> </tr> <tr><td height="30"><input type="button" name="button3" style="width:50px" value="<" onClick="fMoveSelectedOptionsRightToLeft(document.all.leftItem,document.all.rightItem)"></tr></table> <tr><td height="30"><input type="button" name="button4" style="width:50px" value="<<" onClick="fMoveAllOptionsRightToLeft(document.all.leftItem,document.all.rightItem)"><table border="0" align="center"> <tr height="40"> <td><input type="button" value="保存" onClick="checkForm()"></td> </tr> </table><script> /*移除左边选中的列表项到右边*/ function fMoveSelectedOptionsLeftToRight(oLeft,oRight) { if(!(oLeft&&oRight)) { return; } if(!hasOptions(oLeft)) { return; } if(oLeft.selectedIndex==-1) { oLeft.selectedIndex=0; } for(var i=0;i<oLeft.options.length;i++) { if(oLeft.options[i].selected) { var oOption = document.createElement("OPTION"); oOption.setAttribute("text",oLeft.options[i].text); oOption.setAttribute("value",oLeft.options[i].value); oRight.add(oOption); } } clearSelectedOptions(oLeft); } /*移除左边的所有列表项到右边*/ function fMoveAllOptionsLeftToRight(oLeft,oRight) { if(!(oLeft&&oRight)) { return; } if(!hasOptions(oLeft)) { return; } for(var i=0;i<oLeft.options.length;i++) { var oOption = document.createElement("OPTION"); oOption.setAttribute("text",oLeft.options[i].text); oOption.setAttribute("value",oLeft.options[i].value); oRight.add(oOption); } clearAllOptions(oLeft); } /*移除右边选中的列表项到左边*/ function fMoveSelectedOptionsRightToLeft(oLeft,oRight) { if(!(oLeft&&oRight)) { return; } if(!hasOptions(oRight)) { return; } if(oRight.selectedIndex==-1) { oRight.selectedIndex=0; } for(var i=0;i<oRight.options.length;i++) { if(oRight.options[i].selected) { var oOption = document.createElement("OPTION"); oOption.setAttribute("text",oRight.options[i].text); oOption.setAttribute("value",oRight.options[i].value); oLeft.add(oOption); } } clearSelectedOptions(oRight); } /*移除右边的所有列表项到左边*/ function fMoveAllOptionsRightToLeft(oLeft,oRight) { if(!(oLeft&&oRight)) { return; } if(!hasOptions(oRight)) { return; } for(var i=0;i<oRight.options.length;i++) { var oOption = document.createElement("OPTION"); oOption.setAttribute("text",oRight.options[i].text); oOption.setAttribute("value",oRight.options[i].value); oLeft.add(oOption); } clearAllOptions(oRight); } /*清空select所有options*/ function clearAllOptions(oSelect) { if(oSelect) { var ops=oSelect.options; while(ops.length>0) { oSelect.remove(ops.length-1); } } } /*清空select所有选中的options*/ function clearSelectedOptions(oSelect) { if(oSelect) { for(var i=0;i<oSelect.options.length;i++) { if(oSelect.options[i].selected) { oSelect.remove(i--); } } } } /*判断select是否有options*/ function hasOptions(oSelect) { if(oSelect) { return oSelect.options.length>0; } return false; } function checkForm(){ var onRight=document.forms[0].rightItem; alert(onRight.options.length); for(var i=0;i<onRight.options.length;i++){ var text=onRight.options[i].text; var value=onRight.options[i].value; alert(value+" "+text); } } </script> <🎜> <🎜> <🎜> <테이블 테두리="0" 정렬="중앙"> <tr> <🎜> <select name="rightItem" style="width:200px" size="10" multiple="multiple"> </select> <🎜> <🎜> <🎜> <🎜> <🎜> <🎜> <테이블 테두리="0" 정렬="중앙"> <tr 높이="40"> <🎜><input type="button" value="保存" onClick="checkForm()"><🎜> <🎜> <🎜></form> </body> </html>
[Ctrl A 모두 선택 참고: 외부 J를 도입해야 하는 경우 실행하려면 새로 고쳐야 합니다 ]

js 코어 코드

코드 복사 코드는 다음과 같습니다.

/*제거 왼쪽에서 오른쪽으로 선택한 목록 항목* /
function fMoveSelectedOptionsLeftToRight(oLeft,oRight)
{
if(!(oLeft&&oRight))
{

}
if(!hasOptions(oLeft))
{
return;
}
if(oLeft.selectedIndex==-1)
{
oLeft.selectedIndex=0; >}
for(var i= 0;i{
if(oLeft.options[i].selected)
{
var oOption = document.createElement("OPTION");
oOption.setAttribute("text",oLeft.options[i].text)
oOption.setAttribute("value",oLeft.options[i].value) ;
oRight.add(oOption) ;
}
}
clearSelectedOptions(oLeft);
}
/*왼쪽에서 오른쪽으로 모든 목록 항목 제거*/ >function fMoveAllOptionsLeftToRight(oLeft,oRight)
{
if(!(oLeft&&oRight))
{
return;
}
if(!hasOptions(oLeft))
{
반환;
}
for(var i=0;i{
var oOption = document.createElement("OPTION"); >oOption.setAttribute("text",oLeft.options[i].text);
oOption.setAttribute("value",oLeft.options[i].value)
oRight.add(oOption);
}
clearAllOptions(oLeft) ;
}
/*선택한 목록 항목을 오른쪽에서 왼쪽으로 제거*/
function fMoveSelectedOptionsRightToLeft(oLeft,oRight)
{
if(!(oLeft&&oRight))
{
return;
}
if(!hasOptions(oRight))
{
return; oRight.selectedIndex==-1)
{
oRight.selectedIndex=0
}
for(var i=0;i{
if(oRight.options[i].selected)
{
var oOption = document.createElement("OPTION");
oOption.setAttribute("text",oRight.options[i]. text);
oOption.setAttribute("value" ,oRight.options[i].value)
oLeft.add(oOption);
}
}
clearSelectedOptions(oRight);
}
/*오른쪽 항목 제거 왼쪽으로 모든 목록 항목*/
function fMoveAllOptionsRightToLeft(oLeft,oRight)
{
if(!(oLeft&&oRight))
{
return;
}
if(!hasOptions(oRight))
{
return;
}
for(var i=0;i{
var oOption = document.createElement("OPTION");
oOption.setAttribute("text",oRight.options[i].text)
oOption.setAttribute(" value",oRight.options[i].value);
oLeft.add(oOption);
}
clearAllOptions(oRight);
}
/*모든 선택 옵션 지우기*/
functionclearAllOptions(oSelect)
{
if(oSelect)
{
var ops=oSelect.options
while(ops.length>0)
{
oSelect.remove(ops.length-1);
}
}
}
/*선택한 모든 옵션 지우기*/
functionclearSelectedOptions(oSelect)
{
if(oSelect)
{
for (var i=0;i{
if(oSelect.options[i].selected)
{
oSelect.remove(i--);
}
}
}
}
/*select에 옵션이 있는지 판단*/
function hasOptions(oSelect)
{
if(oSelect)
{
return oSelect.options.length>0
}
return
}

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