<html>
<head>
<title> Select控件可编辑 </title>
<script>
function sltChg(o){
if(o.options[o.selectedIndex].text == "新增..."){
var newObj = document.createElement("<input type='text' style='width:100px' name='"+o.name+"'>")
newObj.ondblclick = function(){ //双击回到select控件状态
var selectObj = genSelectObject(o.name);
this.insertAdjacentElement("afterEnd",selectObj);
this.parentNode.removeChild(this);
}
o.insertAdjacentElement("afterEnd",newObj);
o.parentNode.removeChild(o);
newObj.focus();
}
}
function genSelectObject(strName){
//此处可采取更灵活的方式写
//如可采用xmlhttp从后台传回。这样可实现select控件的实时更新，将新增项目增加进select的option
var obj = document.createElement("<select name='"+strName+"'>");
obj.style.width = "100px";
obj.onchange = function(){sltChg(this);};
var opt = new Option("","");
obj.add(opt);
opt = new Option("甲乙丙","1");
obj.add(opt);
opt = new Option("ABC","2");
obj.add(opt);
opt = new Option("一二三","3");
obj.add(opt);
opt = new Option("新增...","") //选择此项进入input控件状态
obj.add(opt);
return obj;
}
</script>
</head>
<body>
<table border="1">
<tr><td width="100px">
<select name="slt" style="width:100px" onchange="sltChg(this)">
<option></option>
<option value="1">甲乙丙</option>
<option value="2">ABC</option>
<option value="3">一二三</option>
<option>新增...</option>
</select>
</td><td width="100px">
<select name="slt" style="width:100px" onchange="sltChg(this)">
<option></option>
<option value="1">甲乙丙</option>
<option value="2">ABC</option>
<option value="3">一二三</option>
<option>新增...</option>
</select>
</td></tr>
</table>
</body>
</html>
拷贝后直接运行可见效果。不支持FF
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