Passing an URL parameter to a href link using Javascript
Question
I have the following code working to pass a URL parameter to a form tag:
<script type="text/javascript">
function getQueryVariable(variable) {
var query = window.location.search.substring(1);
var vars = query.split("&");
for (var i=0;i<vars.length;i++) {
var pair = vars[i].split("=");
if (pair[0] == variable) {
return pair[1];
}
}
}
function onLoad() {
var value = getQueryVariable("ID");
var e = document.getElementById('your-field');
e.value = value;
}
</script>
And...
<body onload="onLoad()">
<!-- your form and hidden field goes here -->
<input type="hidden" name="your-field" id="your-field" />
How can I pass the same value to an HTML link so that the end result would be:
<a href="http://www.mysite.com?source=[ID]" >
Where [ID] is the whatever piece of code that is needed to add the parameter to the link?
Thanks in advance.
2 answers
solution1
7 2012-02-29 23:48:17
You should give an id to you link, like this:
<a id="YOUR_ID" href="#" >
And then you have two ways to solve the problem, use pure Javascript or use jQuery:
IF you use jquery you can use your onLoad function and inside inject the following:
var url = "http://www.mysite.com?source=" + value;
$("#YOUR_ID").attr("href",url)
OR using pure javascript:
var url = "http://www.mysite.com?source=" + value;
var element = document.getElementById('YOUR_ID');
element.setAttribute("href",url)
solution2
1 2012-03-01 00:12:56
Change the function onload to this:
function onLoad() {
var value = getQueryVariable("ID");
var e = document.getElementById('your-field');
e.value = value;
var url = "http://www.mysite.com?source=" + value;
var element = document.getElementById('YOUR_<A>_ELEMENT_ID');
element.setAttribute("href",url)
}
I'm using the piece of code that Joao Almeida suggested so his example using jQuery works good too.
Good Luck!
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