document.getElementById('frmMain').elements
can i use like this
document.getElementByName('frmMain').elements
or
document.getElementBytag('table').elements`
This question is related to
javascript
If you have given same text name for both of your Id and Name properties you can give like document.getElementByName('frmMain')[index] other wise object required error will come.And if you have only one table in your page you can use document.getElementBytag('table')[index].
EDIT:
You can replace the index according to your form, if its first form place 0 for index.
getElementById returns either a reference to an element with an id matching the argument, or null if no such element exists in the document.
getElementsByName() (note the plural Elements) returns a (possibly empty) HTMLCollection of the elements with a name matching the argument. Note that IE treats the name and id attributes and properties as the same thing, so getElementsByName will return elements with matching id also.
getElementsByTagName is similar but returns a NodeList. It's all there in the relevant specifications.
getElementsByName() method accesses all elements with the
specified name.
this method returns collection of elements that is an array.getElementsByTagName() method accesses all elements with the
specified tagname.
this method returns collection of elements that is an array.eg:
<script type="text/javascript">
function getElements() {
var x=document.getElementById("y");
alert(x.value);
}
</script>
</head>
<body>
<input name="x" id="y" type="text" size="20" /><br />
This will return a single HTML element and display the value attribute of it.
<script type="text/javascript">
function getElements() {
var x=document.getElementsByName("x");
alert(x.length);
}
</script>
</head>
<body>
<input name="x" id="y" type="text" size="20" /><br />
<input name="x" id="y" type="text" size="20" /><br />
this will return an array of HTML elements and number of elements that match the name attribute.
Extracted from w3schools.
I assume you are talking about getElementById() returning a reference to an element whilst the others return a node list. Just subscript the nodelist for the others, e.g. document.getElementBytag('table')[4].
Also, elements is only a property of a form (HTMLFormElement), not a table such as in your example.
It's getElementsByName() and getElementsByTagName() - note the "s" in "Elements", indicating that both functions return a list of elements, i.e., a NodeList, which you will access like an array. Note that the second function ends with "TagName" not "Tag".
Even if the function only returns one element it will still be in a NodeList of length one. So:
var els = document.getElementsByName('frmMain');
// els.length will be the number of elements returned
// els[0] will be the first element returned
// els[1] the second, etc.
Assuming your form is the first (or only) form on the page you can do this:
document.getElementsByName('frmMain')[0].elements
document.getElementsByTagName('table')[0].elements
Source: Stackoverflow.com