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I want to change an invisible HTML input in to visible when I click a button as shown below.
My HTML line that create the hidden input is:
<input type="hidden" id="txtHiddenUname" value="invalid input" />
my JavaScript for changing the visibility is:
var y = document.getElementById("txtHiddenUname");
y.style.display= "inline";
But this couldn't make the hidden element to be visible.
Any ideas?
287
Hidden inputs are completely invisible in the rendered page, and there is no way to make it visible in the page's content. A string representing the value of the hidden data you want to pass back to the server.
If you want to post an array you must use another notation: foreach ($postvalue as $value){ <input type="hidden" name="result[]" value="$value."> }
Since they are not rendered visible, hidden inputs are sometimes erroneously perceived as safe. But similar to session cookies, hidden form inputs store the software's state information client-side, instead of server-side. This makes it vulnerable.
You should change the type of input element as :
y.setAttribute('type','text');
//or
y.type = 'text';
1) Either user java script inside body tag as below :
<input type="hidden" id="txtHiddenUname" value="invalid input" />
<script type="text/javascript">
var y = document.getElementById("txtHiddenUname");
y.type= "text";
</script>
OR
2) Use some event handler such as onload
<head>
<script type="text/javascript">
function on_load(){
var y = document.getElementById("txtHiddenUname");
y.type= "text";
}
</script>
</head>
<body onload = "on_load()">
<input type="hidden" id="txtHiddenUname" value="invalid input" />
...
so that the DOM is ready.
82
Here is not matter of CSS it's matter of attributes, So you need to change the attribute type from hidden to something else like text
Kindly check this [how-to-change-html-object-element-data-attribute-value-in-javascript][1]
check this: How to change HTML Object element data attribute value in javascript. To change the attribute value using jQuery or Javascript
40
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