using innerHTML with <input>_问答_开发者_运维开发者技术经验分享

开发者 https://www.devze.com 2023-03-07 18:56 出处：网络

开发者_JAVA技巧I am trying to use the innerHTML method on an input tag and all i get back is a blank string. Here is the code i am useing.

相关专题：javascript

开发者_JAVA技巧

I am trying to use the innerHTML method on an input tag and all i get back is a blank string. Here is the code i am useing.

javascript

function setName(ID){
    document.getElementById('searchtitle').innerHTML = "Enter " + ID.innerHTML;
}

HTML

<input type="radio" name="searchtype" id="test" value="name" onclick="setName(this)">Last Name</input><br/>
<input type="radio" name="searchtype" value="phonenumber" onclick="setName(this)">Phone Number</input><br/>

<label for="inputfield" id="searchtitle" style="font-size:2em;">Enter Last Name</label><br/>
<input type="text" name="inputfield" id="inputfield" style="font-size:2em;"></input>

What is supposed to happen is depending on which radio button I pick the label for the input box should change. I can make the label.innerHTML=radio.value but the values are named for my php code and not formated nicely(ie. phonenumber vs. Phone Number) this is why I am trying to use the innerHTML of the radio button.

Any help I could get would be greatly appriciated.

you should embed input inside of label tag. input tag should closed by />. It's semantic HTML. When you do this clicking on label activate the input. InnerHTML only works for label then. It will return you label value.

<label for="inputfield" id="searchtitle" style="font-size:2em;">Enter Last Name
    <input type="text" name="inputfield" id="inputfield" style="font-size:2em;" />
</label>

JavaScript:

console.log(document.getElementById('searchtitle').innerHTML); // returns 'Enter Last Name'

If you want the value of an input tag, you want to use .value.

First, add labels around your inputs. Second, use getName(this.parentNode). Finally, call innerText instead of innerHtml.

<html>
<head>
<script>
function setName(el){
    document.getElementById('searchtitle').innerHTML = "Enter " + el.innerText;
}
</script>
</head>
<body>
<label><input type="radio" name="searchtype" value="name" onclick="setName(this.parentNode)"/>Last 

Name</label><br/>
<label><input type="radio" name="searchtype" value="phonenumber" onclick="setName(this.parentNode)"/>Phone 

Number</label><br/>

<label for="inputfield" id="searchtitle" style="font-size:2em;">Enter Last Name</label><br/>
<input type="text" name="inputfield" id="inputfield" style="font-size:2em;"></input>
</body>
</html>

Complete edit.

Ok, I figured out what you were looking for. First off, you've got to fix your HTML (don't put text inside of an input... and don't next an input inside of a label).

<label for="test">Last Name</label>
<input type="radio" name="searchtype" id="test" value="name" onclick="setName(this)" />
<br/>
<label for="test2">Phone Number</label>
<input type="radio" id="test2" name="searchtype" value="phonenumber" onclick="setName(this)" />
<br/>
<label for="inputfield" id="searchtitle" style="font-size:2em;">Enter Last Name</label>
<br/>
<input type="text" name="inputfield" id="inputfield" style="font-size:2em;" />

JavaScript (in Jquery, for brevity):

function setName(elem)
{
    $('#searchtitle').html('Enter ' + $('label[for="'+elem.id+'"]').html());
}

You have closed the Input tag improperly with </input> this should be

<input type="radio" name="searchtype" id="test" value="name" onclick="setName(this)"/>Last Name<br/>

<input type="radio" name="searchtype" value="phonenumber" onclick="setName(this)"/>Phone Number<br/>