第一种方法:
1. jsp页面中得标签 <select
<td>
<span class="style1"> </span>
<select name="fatherid" >
<option value="1">类型1 </option>
<option value="2">类型2
</option>
</select>
</td>
2. javaScript:
function selMoreValue(obj,para)
{
var lenSel = eval(obj+".length");
for(var i = 0;i<lenSel;i++)
{
if(eval(obj+".options["+i+"].value") == para)
{
eval(obj+".options["+i+"]").selected = true;
}
}
}
然后在 jsp页面中,
<body onLoad="javascript:selMoreValue('document.all.fatherid','<%=b.getFatherid()%>');">
若有多个select可以再写的pageonload(),只为调用selMoreValue();
function pageonload(){
selMoreValue('document.all.fatherid','<%=b.getFatherid()%>');
selMoreValue('document.all.fatherid2','<%=b.getFatherid2()%>');
……
}
<body onLoad="pageonload()">
第二种方法:
若<option>是jsp页面中循环输出的,还可以这样,若该项value==b.getFatherid()直接out.print("selected");
<%
List list;
list = (List)request.getAttribute("gradedatelst");
Iterator it = list.iterator();
%>
<td>
<span class="style1"> </span>
<select name="fatherid" >
<%
while(it.hasNext()){
Bean gb = (Bean)it.next();
%>
<option value="1">类型1 </option>
<option value="<%=gb.sltvalue()%>" <%if(gb.sltvalue()==b.getFatherid()){out.print("selected")})%>><%=gb.sltvalue()%></option>
<%
}
%>
</select>
</td>