if (selectId.constructor == String) { for(var i = 0; i < textNodes.length; i++) { var defOpt = document.createElement("OPTION"); defOpt.text = textNodes[i].text; defOpt.value = valueNodes[i].text; document.getElementById(selectId).add(defOpt); } } else { selectId.cArray(valueNodes,true); }
}
var sel = document.getElementById("idCaseName"); sel.options.length = 1; sel.options[0].selected = "selected"; for (var i = 0; i < alength; i++) { sel.options[sel.options.length] = new Option(arrstr[i].caseName, arrstr[i].caseId); }
oSelect=document.getElementById('select');
oOptions=document.getElementById('select').options;
for(var i=0;i<oOptions.length;i++){
oOptions.removeChild(oOptions[i]);
}
<form action="" method="post" name="myForm">
<select name="sel">
……
</select>
</form>在js里:
var sel = document.forms["myForm"].elements["sel"];
sel.length = 0; //为0表全清空,为1表留下一项……
* 删除select的option全部或某个值
*/
option.prototype.delOption = function (objId,indexId) {
var selobj = document.getElementById(objId);
if(selobj != "[object]" || selobj != "[object HTMLSelectElement]") {
return false;
}
//var options = selobj.options;
if (indexId != "" && (indexId != undefined || indexId != "undefined") ) {
selobj.remove(indexId);
} else {
for (var i = selobj.options.length -1; i >= 0; i--) {
selobj.remove(i);
}
}
}
* 根据一组options值动态设置select的列表内容
* orderBy 排序方式
*/
option.prototype.setSelectOption = function(textNodes,valueNodes,selectId,orderBy) {
if (selectId.constructor == String) {
for(var i = 0; i < textNodes.length; i++) {
var defOpt = document.createElement("OPTION");
defOpt.text = textNodes[i].text;
defOpt.value = valueNodes[i].text;
document.getElementById(selectId).add(defOpt);
}
} else {
selectId.cArray(valueNodes,true);
}
}
sel.options.length = 1;
sel.options[0].selected = "selected";
for (var i = 0; i < alength; i++) {
sel.options[sel.options.length] = new Option(arrstr[i].caseName, arrstr[i].caseId);
}