Javascript²Ù×÷select¿Ø¼þ´óÈ«
1ÅжÏselectÑ¡ÏîÖÐ ÊÇ·ñ´æÔÚValue="paraValue"µÄItem
2ÏòselectÑ¡ÏîÖÐ ¼ÓÈëÒ»¸öItem
3´ÓselectÑ¡ÏîÖРɾ³ýÒ»¸öItem
4ɾ³ýselectÖÐÑ¡ÖеÄÏî
5ÐÞ¸ÄselectÑ¡ÏîÖÐ value="paraValue"µÄtextΪ"paraText"
6ÉèÖÃselectÖÐtext="paraText"µÄµÚÒ»¸öItemΪѡÖÐ
7ÉèÖÃselectÖÐvalue="paraValue"µÄItemΪѡÖÐ
8µÃµ½selectµÄµ±Ç°Ñ¡ÖÐÏîµÄvalue
9µÃµ½selectµÄµ±Ç°Ñ¡ÖÐÏîµÄtext
10µÃµ½selectµÄµ±Ç°Ñ¡ÖÐÏîµÄIndex
11Çå¿ÕselectµÄÏî
// 1.ÅжÏselectÑ¡ÏîÖÐ ÊÇ·ñ´æÔÚValue="paraValue"µÄItem
function jsSelectIsExitItem(objSelect, objItemValue) {
var isExit = false;
for (var i = 0; i < objSelect.options.length; i++) {
if (objSelect.options[i].value == objItemValue) {
isExit = true;
break;
}
}
return isExit;
}
// 2.ÏòselectÑ¡ÏîÖÐ ¼ÓÈëÒ»¸öItem
function jsAddItemToSelect(objSelect, objItemText, objItemValue) {
//ÅжÏÊÇ·ñ´æÔÚ
if (jsSelectIsExitItem(objSelect, objItemValue)) {
alert("¸ÃItemµÄValueÖµÒѾ´æÔÚ");
} else {
var varItem = new Option(objItemText, objItemValue);
objSelect.options.add(varItem);
alert("³É¹¦¼ÓÈë");
}
}
// 3.´ÓselectÑ¡ÏîÖРɾ³ýÒ»¸öItem
function jsRemoveItemfromSelect(objSelect, objItemValue) {
//ÅжÏÊÇ·ñ´æÔÚ
if (jsSelectIsExitItem(objSelect, objItemValue)) {
for (var i = 0; i < objSelect.options.length; i++) {
if (objSelect.options[i].value == objItemValue) {
objSelect.options.remove(i);
break;
}
}
alert("³É¹¦É¾³ý");
} else {
alert("¸ÃselectÖÐ ²»´æÔÚ¸
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