nextsibiling doesn't work
this is a sample code of what I am doing. unfortunately the alert(nextElem.value) returns "undefined" when I click the second checkbox to get the href of the link after开发者_JAVA技巧 it. do you have any idea how to fix it?
<HTML>
<HEAD>
<TITLE>Checkbox Inspector</TITLE>
<SCRIPT LANGUAGE="JavaScript">
function validate()
{
for (i = 0; i <(document.f1.checkThis.length) ; i++) {
if (document.f1.checkThis[i].checked) {
var elem = document.f1.checkThis[i];
var nextElem = elem.nextSibling;
alert(nextElem.href);
}
}
}
</SCRIPT>
</HEAD>
<BODY>
<FORM name="f1">
<INPUT TYPE="checkbox" NAME="checkThis" value="http://www.google.com" onClick="validate()">Check here<BR>
<a href="http://www.google.com">click here</a>
</FORM>
</BODY>
</HTML>
Get the link's href with jQuery
http://jsfiddle.net/mplungjan/H9Raz/ :
$('form input:checkbox').click(function () {
alert($(this).nextAll('a').attr("href"));
});
Because of the BRs we need the nextAll, surprisingly since I was using the next selector with an "a"
See here why it did not work: Cleanest way to get the next sibling in jQuery
Get the link's href with forms access and usage of ID - no jQuery
http://jsfiddle.net/mplungjan/fKE3v/
window.onload=function() {
var chks = document.getElementsByName('checkThis');
for (var i=0;i<chks.length;i++) {
chks[i].onclick=function() {
var id = this.id;
var linkId="link_"+id.split("_")[1]
alert(document.getElementById(linkId).href)
}
}
}
<form>
<div>
<input type="checkbox" name="checkThis" id="chk_1" value="http://www.google.com" />Check here<br/>
<a href="http://www.google.com" id="link_1">click here</a><br>
<input type="checkbox" name="checkThis" id="chk_2" value="http://www.bing.com" />Check here<br/>
<a href="http://www.bing.com" id="link_2">click here</a>
</div>
</form>
Forms access to get the next checkbox
<INPUT TYPE="checkbox" NAME="checkThis" value="http://www.google.com" onClick="validate(this.form)">Check here<BR>
<INPUT TYPE="checkbox" NAME="checkThis" onClick="validate(this.form)">Check here2<BR>
function validate(theForm) {
var chk = theForm.checkThis
for (i = 0; i <chk.length) ; i++) {
if (chk[i].checked) {
var nextElem = chk[i+1];
if (nextElem) alert(nextElem.value);
}
}
}
Your problem is that nextElem is the text node immediately after your checkbox, not the next checkbox; text nodes don't have value attributes. For example, try this:
function validate() {
for (i = 0; i < (document.f1.checkThis.length); i++) {
if (document.f1.checkThis[i].checked) {
var elem = document.f1.checkThis[i];
var nextElem = elem.nextSibling;
alert(nextElem);
alert(nextElem.value);
}
}
}
Or, for your convenience:
http://jsfiddle.net/ambiguous/sUzBL/1/
加载中,请稍侯......
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