主题:如何取出select的选中的值

<select size="1" name="Service_catalog" onchange="alert(this.options[this.selectedIndex].value)">

[b][color=navy]Blueidea Web Team


[size=1]Moderator Of DW & JS Forum[/size][/color][/b]

怎么不行？你option里面没有value当然alert出来就是空值喽，自己加个value不就是了，<option>没有value你想用它干什么~~~

N个蓝色大泡泡


Blueidea Web Team.


Moderator Of DW & JS Forum

续

var otv = new Array (

'01','http://www.shotv.com/tvguide/schedule01.html',

'02','http://www.shotv.com/tvguide/schedule02.html',

'03','http://www.shotv.com/tvguide/schedule03.html',

'04','http://www.shotv.com/tvguide/schedule04.html',

'05','http://www.shotv.com/tvguide/schedule05.html',

'06','http://www.shotv.com/tvguide/schedule06.html',

'07','http://www.shotv.com/tvguide/schedule07.html',

'08','http://www.shotv.com/tvguide/schedule08.html',

'09','http://www.shotv.com/tvguide/schedule09.html',

'10','http://www.shotv.com/tvguide/schedule10.html',

'11','http://www.shotv.com/tvguide/schedule11.html',

'12','http://www.shotv.com/tvguide/schedule12.html',

'13','http://www.shotv.com/tvguide/schedule13.html',

'14','http://www.shotv.com/tvguide/schedule14.html'

)

var b = new Array (

'重庆','http://www.cctv.com/tvguide/program/21/%weeknum%.html',

'福建东南','http://www.cctv.com/tvguide/program/22/%weeknum%.html',

'北京四','http://www.cctv.com/tvguide/program/23/%weeknum%.html',

'北京一','http://www.cctv.com/tvguide/program/24/%weeknum%.html',

'广东','http://www.cctv.com/tvguide/program/25/%weeknum%.html',

'河北-1','http://www.cctv.com/tvguide/program/26/%weeknum%.html',

'河南','http://www.cctv.com/tvguide/program/27/%weeknum%.html',

'黑龙江','http://www.cctv.com/tvguide/program/28/%weeknum%.html',

'湖北','http://www.cctv.com/tvguide/program/29/%weeknum%.html',

'湖南','http://www.cctv.com/tvguide/program/30/%weeknum%.html',

'江苏','http://www.cctv.com/tvguide/program/31/%weeknum%.html',

'江西','http://www.cctv.com/tvguide/program/32/%weeknum%.html',

'辽宁','http://www.cctv.com/tvguide/program/33/%weeknum%.html',

'山东','http://www.cctv.com/tvguide/program/34/%weeknum%.html',

'山西','http://www.cctv.com/tvguide/program/35/%weeknum%.html',

'陕西','http://www.cctv.com/tvguide/program/36/%weeknum%.html',

'上海','http://www.cctv.com/tvguide/program/37/%weeknum%.html',

'四川','http://www.cctv.com/tvguide/program/38/%weeknum%.html',

'天津','http://www.cctv.com/tvguide/program/39/%weeknum%.html',

'云南','http://www.cctv.com/tvguide/program/40/%weeknum%.html',

'浙江','http://www.cctv.com/tvguide/program/41/%weeknum%.html',

'安徽','http://www.cctv.com/tvguide/program/42/%weeknum%.html'

)

var setv = new Array (

'上海教育电视台','http://www.setv.sh.cn/manual/frame.htm'

)

//以下程序码摘自《INSTANT JAVASCRIPT》一书，有改动

function replace(string,text,by) {

var strLength = string.length;

var txtLength = text.length;



if ((strLength == 0) || (txtLength == 0))

return string;



var i = string.indexOf(text);



if (i == -1)

return string;



var newstr = string.substring(0,i) + by;



newstr +=

replace(string.substring(i+txtLength,strLength),text,by);



return newstr;

}



function addOption(fRef, sName, sText, sValue) {

var def = true;

var sel = true;

var optionName = new Option(sText, sValue, def, sel);

var length = fRef[sName].length;

fRef[sName].options[length] = optionName;

fRef[sName].options[length].selected = false;

}



function deleteOptions(fRef, sName, force) {

var length = fRef[sName].options.length;

for (var i=0; i<fRef[sName].options.length; i++) {

if (fRef[sName].options[i].selected || force) {

fRef[sName].options[i] = null;

length--;

i--;

}

}

}



function getAnOptionValue(what) {

return what.options[what.options.selectedIndex].value;

}



function updateColors(fRef, sName1, sName2) {

deleteOptions(fRef,sName2,true);



var color = getAnOptionValue(fRef[sName1]);

var colorObject = eval(color);



for (var i=0; i<colorObject.length;i+=2) {

addOption(fRef, sName2, colorObject[i], colorObject[i+1]);

}



fRef[sName2].options.selectedIndex = 0;

}

//摘录部分结束



var weekdayeng = new Array ('sun','mon','tue','wed','thu','fri','sat')

var weekdaynum = new Array ('0','1','2','3','4','5','6')

function WeekAlias(weeknum,aliastype) {

var aliasArray = eval(aliastype);

return aliasArray[weeknum];

}

function getTVguide() {

var myURL=getAnOptionValue(document.tv.channel);

var myWeeknum=eval(getAnOptionValue(document.tv.weekd));

myURL=replace(myURL,"%weeknum%",WeekAlias(myWeeknum,weekdaynum));

myURL=replace(myURL,"%weekeng%",WeekAlias(myWeeknum,weekdayeng));

var temp=window.open(myURL);

}

//--></script>

</HEAD><BODY>

<H1 align="center"><FONT color="#ccccff">电视节目表</FONT></H1>





<form name="tv">

<TABLE align="center">

<TR>

<TD width="150">

<select name="group" size="16"

onChange="updateColors(this.form, 'group', 'channel')">

<option value="cctv">中央电视台

<option value="stv">上海电视台

<option value="otv">东方电视台

<option value="b">各地卫视

<option value="setv">上海教育电视台

</select>

<TD width="150">

<select name="channel" size="16">

<option>

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;

</option>

</select>

<TD width="150">

<select name="weekd" size="16">

<option value="0">星期日

<option value="1">星期一

<option value="2">星期二

<option value="3">星期三

<option value="4">星期四

<option value="5">星期五

<option value="6">星期六

</select>

<SCRIPT language="JScript">

var today=new Date()

var todayWeek=today.getDay()

document.tv.weekd.selectedIndex=todayWeek

</SCRIPT>

<TR><TD COLSPAN=3 ALIGN=CENTER><INPUT type="button" name="get" value="&nbsp;&nbsp;&nbsp;获&nbsp;取&nbsp;节&nbsp;目&nbsp;表&nbsp;&nbsp;&nbsp;" onClick="getTVguide()">

</TABLE>

</form>

</BODY></HTML>

Fred Smith


fredsmith87@163.com