根据网页表单上的元素自动生成段落

Question

我正在尝试根据同一页面上的表单选择创建段落的实时预览。我一直在使用这段代码。

    <script type="text/javascript">

function yesnoCheck() {
    if (document.getElementById('yesCheck').checked) {
        document.getElementById('ifYes').style.display = 'block';
    }
    else document.getElementById('ifYes').style.display = 'none';

}

</script>
Yes <input type="radio" onclick="javascript:yesnoCheck();" name="yesno" id="yesCheck"> No <input type="radio" onclick="javascript:yesnoCheck();" name="yesno" id="noCheck"><br>
    <div id="ifYes" style="display:none">
        If yes, where: <input type='text' id='yes' name='yes'><br>
        When?  <input type='text' id='acc' name='acc'>
    </div>

我想的结果是会有一个预先准备好的段落，它将出现在表格的底部，并将根据上述选项的选择进行更改。比如，如果选择了 'Yes'，那么会出现：

Mr. X will be present in 'London' at '8am'

如果选择'No'，则会出现：

Mr. X will be absent

在此先感谢您的帮助。

Answer 1

尝试以下操作：

<html>
        <head>
        </head>
        <body>
            Yes <input type="radio" onclick="yesnoCheck();" name="yesno" id="yesCheck"> No <input type="radio" onclick="yesnoCheck();" name="yesno" id="noCheck"><br>
        <div id="ifYes" style="display:none">
            If yes, where: <input type='text' onchange="onLocationChange();" id='yes' name='yes'><br>
            When?  <input type='text' id='acc' onchange="onTimeChange();" name='acc'>

            <div>
                Mr. X will be present 
                <span id="location" style="display: none;"></span>
                <span id="time" style="display: none;"></span>
            </div>
        </div>
        <div id="ifNo" style="display:none">
           Mr. X will be absent
        </div>

        <script>
        function onLocationChange(){
            var value = document.getElementById('yes').value;
            if (value) {
                document.getElementById('location').style.display = 'inline';
                document.getElementById('location').innerHTML = ' in ' + value; 
            }
            else {
                document.getElementById('location').style.display = 'none';
            }

        }

        function onTimeChange(){
            var value = document.getElementById('acc').value;

            if (value) {
                document.getElementById('time').style.display = 'inline';
                document.getElementById('time').innerHTML = ' at ' + value;
            }
            else {
                document.getElementById('time').style.display = 'none';
            }

        }
        function yesnoCheck() {

            if (document.getElementById('yesCheck').checked) {
                document.getElementById('ifYes').style.display = 'block';
                document.getElementById('ifNo').style.display = 'none';
            }
            else {
                document.getElementById('ifYes').style.display = 'none';
                document.getElementById('ifNo').style.display = 'block';
            }


        }
        </script>
        </body>
    </html>

Answer 2

希望这是你的要求

  

function yesnoCheck() {
    if (document.getElementById('yesCheck').checked) {
        document.getElementById('ifYes').style.display = 'block';
        document.getElementById('targetDiv').innerHTML=""
    }
    else {
    document.getElementById('targetDiv').innerHTML="Mr. X will be absent";
    document.getElementById('ifYes').style.display = 'none';
    document.getElementById('yes').value=""
    document.getElementById('acc').value=""
    }

}
function showResult(){
 var yes=document.getElementById('yes').value
    var acc=document.getElementById('acc').value
   if(yes!="" && acc!="" ){
       document.getElementById('targetDiv').innerHTML="Mr. X will be present in '"+yes+"' at '"+acc+"'"
   } 
  else{
  alert("Input are blank")
  }
}

<!DOCTYPE html>
<html>

<body>
Yes <input type="radio" onclick="javascript:yesnoCheck();" name="yesno" id="yesCheck"> No <input type="radio" onclick="javascript:yesnoCheck();" name="yesno" id="noCheck"><br>
    <div id="ifYes" style="display:none">
        If yes, where: <input type='text' id='yes' name='yes'><br>
        When?  <input type='text' id='acc' name='acc'>
        <button type="button" onclick="showResult()">Show Result</button>
    </div>
    <div id="targetDiv"></div>

</body>
</html>

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