将所有单选按钮的值打印到文本区域
Printing values of all radio buttons to a textarea?
因此,我在一个跨度中有一个单选按钮列表,当按下encode时,我想使用JavaScript使用函数bin2dec将这些单选按钮的值打印到文本区域(id of:BINARYBit)。如果选择了收音机,我需要这些值为1,如果没有选择,则需要这些值0。我在下面添加了一个片段,显示了我的整个文档。有什么想法吗?谢谢
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8" />
<link rel="stylesheet" type="text/css" href="bootstrap.css" />
</head>
<body>
<div class="container">
<div class="col-lg-8">
<label for="HEXBit">Input the Bitmask Here</label>
<br/>
<input type="text" class="form-control" id="DECBit" />
<br/>
<input type="submit" class="btn btn-primary btn-sm" id="Submit" value="Decode" onclick="dec2bin();" />
<br/>
<input type="text" class="form-control" id="BINARYBit" disabled="disabled" />
<br/>
<input type="submit" class="btn btn-primary btn-sm" id="SubmitCon" value="Encode" onclick="bin2dec();" />
<br/>
<span id="radiocheck">
<br/>
<input type="radio" id="BinaryMessage" />
<label for="BinaryMessage">Send Binary Message</label>
<br/>
<input type="radio" id="Param1" />
<label for="Param1">Param1</label>
<br/>
<input type="radio" id="MDMID" />
<label for="MDMID">Modem ID </label>
<br/>
<input type="radio" id="GPIO" />
<label for="GPIO">GPIO</label>
<br/>
<input type="radio" id="AnalogDigi1" />
<label for="AnalogDigi1">Digital/Analog 1</label>
<br/>
<input type="radio" id="AnalogDigi2" />
<label for="AnalogDigi2">Digital/Analog 2</label>
<br/>
<input type="radio" id="StoreMsg" />
<label for="StoreMsg">Save Message if no GPRS</label>
<br/>
<input type="radio" id="InputNum" />
<label for="InputNum">Input Event Number</label>
<br/>
<input type="radio" id="GPSDate" />
<label for="GPSDate">GPS Date</label>
<br/>
<input type="radio" id="GPSStatus" />
<label for="GPSStatus">GPS Status</label>
<br/>
<input type="radio" id="GPSLat" />
<label for="GPSLat">Latitude</label>
<br/>
<input type="radio" id="GPSLong" />
<label for="GPSLong">Longitude</label>
<br/>
<input type="radio" id="GPSSpeed" />
<label for="GPSSpeed">GPS Speed (Knots)</label>
<br/>
<input type="radio" id="GPSHeading" />
<label for="GPSHeading">Heading</label>
<br/>
<input type="radio" id="GPSTime" />
<label for="GPSTime">GPS Time</label>
<br/>
<input type="radio" id="GPSAlt" />
<label for="GPSAlt">Altitude</label>
<br/>
<input type="radio" id="GPSNoSAT" />
<label for="GPSNoSAT">Number of GPS Satelites</label>
<br/>
<input type="radio" id="LowPowerMsg" />
<label for="LowPowerMsg">Stop Messages In Low Power</label>
<br/>
<input type="radio" id="SMSNoGPRS" />
<label for="SMSNoGPRS">Send SMS When No GPRS</label>
<br/>
<input type="radio" id="LastKnownGPS" />
<label for="LastKnownGPS">Use Last Known GPS When Unavaliable</label>
<br/>
<input type="radio" id="GPSOdo" />
<label for="GPSOdo">Odometer</label>
<br/>
<input type="radio" id="RTCTime" />
<label for="RTCTime">RTC Time</label>
<br/>
<input type="radio" id="ShortID" />
<label for="ShortID">Use Short Modem ID</label>
<br/>
<input type="radio" id="BattLVL" />
<label for="BattLVL">Power Level</label>
<br/>
<input type="radio" id="GPSOverSpeed" />
<label for="GPSOverSpeed">GPS Overspeed Data</label>
<br/>
<input type="radio" value="1" id="PCELL" />
<label for="PCELL">PCELL Data</label>
<br/>
<input type="radio" id="GPSALTOvr" />
<label for="GPSALTOvr">GPS Alternative Over Speed</label>
</span>
</div>
</div>
</body>
<script language="JavaScript">
function dec2bin() {
var dec = document.getElementById("DECBit").value
var val = (dec >>> 0).toString(2);
var pad = "00000000000000000000000000000000";
var answer = pad.substring(0, pad.length - val.length) + val;
var arr = [];
for (var i = 0; i < answer.length; i++) {
arr[i] = (answer.charAt(i) == "1" ? true : false);
}
arr.reverse();
console.log(answer);
console.log(arr);
document.getElementById("BINARYBit").value = answer;
var span = document.getElementById("radiocheck");
var inputs = span.getElementsByTagName("input");
for (var i = 0; i < arr.length; ++i) {
var thing = inputs[i];
thing.checked = arr[i];
}
function bin2dec() {
}
}
</script>
</html>
使用本机javascript,最好的方法是提供所有要检查类(如class="item"
)的输入,然后在函数中搜索所有这些项,如下所示:
function bin2dec() {
var printableEncoded = "",
items = document.getElementsByClassName("item");
// For each item if it's checked include a '1', else a '0'
for (var i = 0; i < items.length; i++) {
printableEncoded += items[i].checked ? "1" : "0";
}
// Change the value of the disabled input to the encoded string
document.getElementById("BINARYBit").value = printableEncoded;
}
HTML示例:
<input type="radio" value="1" id="PCELL" class="item" />
<label for="PCELL">PCELL Data</label>
使用jquery 的解决方案
function encode()
{
var value="";
//select all radio buttons
$(".container input[type='radio']").filter(function(i,el){
//check if radio button is checked
value=value + ( ($(el).prop("checked")==true)? "1":"0");
});
$("#BINARYBit").val(value);
}
裁判:
- http://api.jquery.com/filter/
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