getElementsByTagName时，对页面上所有的select怎么操作

现在已经知道j=第几行的值了，我想根据j 获取这行中select的选中值！怎么得到？？

解决方案 »

  1.   

    select.value
    <html>
    <head>
    <title>
    javascript
    </title></head>
    <body>
    <select id="test">
    <option value="1">1</option>
    <option value="2">2</option>
    <option value="3">3</option>
    <option value="4">4</option>
    <option value="5">5</option>
    </select>
    <input type="button" onclick="alert(document.getElementById('test').value);" value="test" />
    </body>
    </html>
      

  2.   

    var slt=document.getElementById("id");
    slt.value;
    slt.option[slt.selectedIndex].text
      

  3.   


    <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3c.org/TR/1999/REC-html401-19991224/loose.dtd">
    <!-- saved from url=(0053)http://localhost:4213/contactManager/equipments2.aspx -->
    <HTML xmlns="http://www.w3.org/1999/xhtml"><HEAD id=Head1><TITLE>租赁设备</TITLE>
    <META http-equiv=Content-Type content="text/html; charset=utf-8"><LINK 
    href="租赁设备.files/Main.css" type=text/css rel=Stylesheet><LINK 
    href="租赁设备.files/test.css" type=text/css rel=Stylesheet>
    <META content="MSHTML 6.00.2900.6049" name=GENERATOR></HEAD>
    <BODY>
    <FORM id=form1 name=form1 action=equipments2.aspx method=post target=_self>
    <DIV><INPUT id=__EVENTTARGET type=hidden name=__EVENTTARGET> <INPUT 
    id=__EVENTARGUMENT type=hidden name=__EVENTARGUMENT> <INPUT id=__LASTFOCUS 
    type=hidden name=__LASTFOCUS> <INPUT id=__VIEWSTATE type=hidden 
    value=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 
    name=__VIEWSTATE> </DIV>
    <SCRIPT type=text/javascript>
    //<![CDATA[
    var theForm = document.forms['form1'];
    if (!theForm) {
        theForm = document.form1;
    }
    function __doPostBack(eventTarget, eventArgument) {
        if (!theForm.onsubmit || (theForm.onsubmit() != false)) {
            theForm.__EVENTTARGET.value = eventTarget;
            theForm.__EVENTARGUMENT.value = eventArgument;
            theForm.submit();
        }
    }
    //]]>
    </SCRIPT><DIV>
    <DIV style="WIDTH: 90%" align=right><INPUT id=ImageButton1 
    style="BORDER-TOP-WIDTH: 0px; BORDER-LEFT-WIDTH: 0px; BORDER-BOTTOM-WIDTH: 0px; BORDER-RIGHT-WIDTH: 0px" 
    onclick=getLastId(); type=image src="租赁设备.files/add3.jpg" 
    name=ImageButton1></DIV><INPUT id=HiddenField2 type=hidden name=HiddenField2> 
    <INPUT id=Repeater1_ctl00_Hiddenem_id type=hidden value=16 
    name=Repeater1$ctl00$Hiddenem_id> 
    <DIV style="WIDTH: 100%; BACKGROUND-COLOR: #cccccc">名称：&nbsp;测试设备11 &nbsp;&nbsp; 
    <INPUT id=Checkbox2 type=checkbox value=16 name=allck>0100210011 <BR>单价： <INPUT 
    id=Repeater1_ctl00_txtrentmoney style="WIDTH: 60px" disabled value=0 
    name=Repeater1$ctl00$txtrentmoney>元&nbsp; 类型： <SELECT 
    id=Repeater1_ctl00_droplistrtType 
    onchange="getvalue(this);setTimeout('__doPostBack(\'Repeater1$ctl00$droplistrtType\',\'\')', 0)" 
    name=Repeater1$ctl00$droplistrtType> <OPTION value=1 selected>面积</OPTION> 
      <OPTION value=2>体积</OPTION> <OPTION value=3>吨位</OPTION> <OPTION 
      value=4>日</OPTION> <OPTION value=5>月</OPTION> <OPTION value=6>季</OPTION> 
      <OPTION value=7>半年</OPTION> <OPTION value=8>年</OPTION> <OPTION 
      value=9>n年</OPTION></SELECT> 
    <HR>
    </DIV><INPUT id=Repeater1_ctl01_Hiddenem_id type=hidden value=10 
    name=Repeater1$ctl01$Hiddenem_id> 
    <DIV style="WIDTH: 100%; BACKGROUND-COLOR: #cccccc">名称：&nbsp;测试设备3 &nbsp;&nbsp; 
    <INPUT id=Checkbox2 type=checkbox value=10 name=allck>0100110005 <BR>单价： <INPUT 
    id=Repeater1_ctl01_txtrentmoney style="WIDTH: 60px" disabled value=0 
    name=Repeater1$ctl01$txtrentmoney>元&nbsp; 类型： <SELECT 
    id=Repeater1_ctl01_droplistrtType 
    onchange="getvalue(this);setTimeout('__doPostBack(\'Repeater1$ctl01$droplistrtType\',\'\')', 0)" 
    name=Repeater1$ctl01$droplistrtType> <OPTION value=1 selected>面积</OPTION> 
      <OPTION value=2>体积</OPTION> <OPTION value=3>吨位</OPTION> <OPTION 
      value=4>日</OPTION> <OPTION value=5>月</OPTION> <OPTION value=6>季</OPTION> 
      <OPTION value=7>半年</OPTION> <OPTION value=8>年</OPTION> <OPTION 
      value=9>n年</OPTION></SELECT> 
    <HR>
    </DIV><INPUT id=Repeater1_ctl02_Hiddenem_id type=hidden value=6 
    name=Repeater1$ctl02$Hiddenem_id> 
    <DIV style="WIDTH: 100%; BACKGROUND-COLOR: #cccccc">名称：&nbsp;测试设备1 &nbsp;&nbsp; 
    <INPUT id=Checkbox2 type=checkbox value=6 name=allck>0100110001 <BR>单价： <INPUT 
    id=Repeater1_ctl02_txtrentmoney style="WIDTH: 60px" disabled value=0 
    name=Repeater1$ctl02$txtrentmoney>元&nbsp; 类型： <SELECT 
    id=Repeater1_ctl02_droplistrtType 
    onchange="getvalue(this);setTimeout('__doPostBack(\'Repeater1$ctl02$droplistrtType\',\'\')', 0)" 
    name=Repeater1$ctl02$droplistrtType> <OPTION value=1 selected>面积</OPTION> 
      <OPTION value=2>体积</OPTION> <OPTION value=3>吨位</OPTION> <OPTION 
      value=4>日</OPTION> <OPTION value=5>月</OPTION> <OPTION value=6>季</OPTION> 
      <OPTION value=7>半年</OPTION> <OPTION value=8>年</OPTION> <OPTION 
      value=9>n年</OPTION></SELECT> 
    <HR>
    </DIV><!-- AspNetPager 7.3.2  Copyright:2003-2010 Webdiyer (www.webdiyer.com) -->
    <DIV class=anpager id=AspNetPager1 style="WIDTH: 100%; TEXT-ALIGN: center"><A 
    style="MARGIN-RIGHT: 5px" disabled>首页</A><A style="MARGIN-RIGHT: 5px" 
    disabled>上一页</A><SPAN class=cpb style="MARGIN-RIGHT: 5px">1</SPAN><A 
    style="MARGIN-RIGHT: 5px" disabled>下一页</A><A style="MARGIN-RIGHT: 5px" 
    disabled>尾页</A> </DIV><!-- AspNetPager 7.3.2  Copyright:2003-2010 Webdiyer (www.webdiyer.com) --></DIV></FORM>
    <SCRIPT language=javascript type=text/javascript>
     function getLastId()
     {
          var   getCK=document.getElementsByTagName("input");
          var selects=document.getElementsByTagName("select");
          var cks= document.getElementsByName("allck");
          for(var j=0;j<cks.length;j++)
          {
            if(cks[j].type=="checkbox")
            {
                if(cks[j].checked)
                {
                    alert("我的天啊"+cks[j].value+"*********"); 
                    alert(selects.item[j]);
                }
            }
          }
         
     }
     function getvalue(obj)
     {
            var m=obj.options[obj.selectedIndex].value
            alert(m);//获取value
            var n=obj.options[obj.selectedIndex].text
            alert(n);//获取文本 
     }
    </SCRIPT>
    </BODY></HTML>