html drop-down box problem_html/css_WEB-ITnose

HTML

I want to get the value passed from the background,
The code for the ordinary text type is as follows:

<INPUT type="text" name="pa_sys_master.M_EMAIL" value="<%=map.get("M_EMAIL") %>">

I get it through the value attribute
But what about the drop-down box? How to get the value passed from the background?
The code is as follows:

<select name = "pa_sys_master.M_STATE">						<option value = "-">请选择</option>						<option value = "0">无状态</option>						<option value = "1">有状态</option> 					</select>

Reply to discussion (solution)

I don’t understand what you want to say. What do you mean? Can the selected list be judged by the text value?

The above is the "input tag" that can implement the "get value" and value passing functions
The following is the "select drop-down tag" How to receive the value?

is to get the currently selected drop-down when modifying

                                                                                        status
.get(x)=="0"}"> >Stateless
                                                       
                                                                                                                                                                   Stateless
                                                                          
Try this.

4th Floor This is what I wrote


But when I execute and return (return to the previous interface), if there is please select will report an error, is there any good solution?


str is your own value
if(str==select.options[i].value){
select.selectedIndex=i;

}

means that the value you pass is the same as select.options[i].value; you assign this i to select.selectedIndex
like this You can automatically determine the options of the select through the value;

<TR>				<TD align="center">管理员权限</TD>				<TD colSpan=7>					<select name = "power.R_ID" >						<option value="-" >请选择</option>						<option value="1" <%if(map.get("R_ID").equals(1)){%>selected="selected"  <%} %>>超级管理员</option>						<option value="2" <%if(map.get("R_ID").equals(2)){%>selected="selected"  <%} %>>管理员</option>						<option value="3" <%if(map.get("R_ID").equals(3)){%>selected="selected"  <%} %>>项目编辑</option>						<option value="4" <%if(map.get("R_ID").equals(4)){%>selected="selected"  <%} %>>客户专员</option>						<option value="5" <%if(map.get("R_ID").equals(5)){%>selected="selected"  <%} %>>浏览用户</option>					</select>				</TD>			</TR>

If you don’t understand, tell me

//eleId drop-down box ID selectedValue is the drop-down box value

function selected(eleId, selectedValue) {

var obj = document.getElementById(eleId);
for ( var tmp = 0; tmp if (obj.options[tmp].value == selectedValue) {
obj.options[tmp].selected = true;
break;
}
}

}

Execute this method after loading

Use s:select, just one label is enough


Is there any difference between the 6th floor and what I wrote?
Where do I write your if(_)? Backstage?