You can use a JavaScript event handler to initiate a Floodlight call when users take some action such as a click, downloading a PDF, selecting an item from a menu, or submitting a form.
The method described below requires that the user's browser have JavaScript enabled. If JavaScript is turned off, then the Floodlight call will not be made.
Overview
The basic premise of this method is to build an Iframe or image tag (in the case of Image Floodlight tags) dynamically using JavaScript, with all the required parameters such as custom variables, sales-related variables, and cache-busters.
Since the parameters used to define the Floodlight activity itself (type and cat) are also present in the URL, it’s also possible to use this method to call different Floodlight activities dynamically from the same page. This is useful for AJAX-based pages.
The functions described below can be called using an onclick() or onsubmit() function inside the body of the HTML file. For onclick events that redirect to a landing page or a file download, you must use the attribute target="_blank", otherwise the redirection to the same browser tab will prevent the tag from firing properly.
You can find additional similar examples of working code implemented in this demo page (the website administrator can look at the source code).
We recommend that you implement any JavaScript function declarations in the <head> section of the webpage.
The following example uses a custom variable, u1.
<script type="text/javascript" id="DoubleClickFloodlightTag">
//<![CDATA[
function FLOOD1(type, cat, u1) {
var axel = Math.random()+"";
var a = axel * 10000000000000000;
var flDiv=document.body.appendChild(document.createElement("div"));
flDiv.setAttribute("id","DCLK_FLDiv1");
flDiv.style.position="absolute";
flDiv.style.top="0";
flDiv.style.left="0";
flDiv.style.width="1px";
flDiv.style.height="1px";
flDiv.style.display="none";
flDiv.innerHTML='<iframe id="DCLK_FLIframe1" src="http://12345678.fls.doubleclick.net/activityi;src=12345678;type=' + type + ';cat=' + cat + ';u1=' + u1 + ';ord=' + a + '?" width="1" height="1" frameborder="0"><\/iframe>';
}
//]]>
</script>
</head>
<body>
<!-- This is an example of a "onclick" call on a anchor tag -->
<a href="http://address_of_page_to_load_or_file_to_download" onclick="FLOOD1('testtype', 'testcat', 'testu1');" target="_blank">Click here to test the tag</a>
</body>
Note that using an image tag will prevent default and publisher tags from being fired.
<script type="text/javascript" id="DoubleClickFloodlightTag">
//<![CDATA[
function FLOOD2(type, cat, u1) {
var axel = Math.random()+"";
var a = axel * 10000000000000000;
var spotpix = new Image();
spotpix.src="http://ad.doubleclick.net/activity;src=12345678;type=" + type + ";cat=" + cat + ";u1=" + u1 + ";ord=" + a + "?";
}
//]]>
</script>
</head>
<body>
<!-- This is an example of a "onclick" call on a anchor tag -->
<a href="http://address_of_page_to_load_or_file_to_download" onclick="FLOOD2('testtype', 'testcat', 'testu1');" target="_blank">Click here to test the tag</a>
</body>
In this case, calling a function with the value 1 (or a generic value) for isUnique will call the tag as a Unique Users 24 Hours counter type, while passing a value of 0 or omitting the value will call the tag as a standard counter type.
<script type="text/javascript" id="DoubleClickFloodlightTag">
//<![CDATA[
function FLOOD3(type, cat, isUnique) {
var axel = Math.random()+"";
var a = axel * 10000000000000000;
var flDiv=document.body.appendChild(document.createElement("div"));
var cachebust = (isUnique)?';ord=1;num=':';ord=';
flDiv.setAttribute("id","DCLK_FLDiv1");
flDiv.style.position="absolute";
flDiv.style.top="0";
flDiv.style.left="0";
flDiv.style.width="1px";
flDiv.style.height="1px";
flDiv.style.display="none";
flDiv.innerHTML='<iframe id="DCLK_FLIframe1" src="http://12345678.fls.doubleclick.net/activityi;src=12345678;type=' + type + ';cat=' + cat + cachebust + a + '?" width="1" height="1" frameborder="0"><\/iframe>';
}
//]]>
</script>
</head>
<body>
<!-- This is an example of a "onclick" call on a anchor tag -->
<a href="http://address_of_page_to_load_or_file_to_download" onclick="FLOOD3('testtype', 'testcat', 1);" target="_blank">Click here to test the tag</a>
</body>
Use the following code to create tags specifying qty (activity count), cost, and ord parameters, plus a custom variable, u1.
<script type="text/javascript" id="DoubleClickFloodlightTag">
//<![CDATA[
function FLOOD4(qty, cost, u1, ord) {
var flDiv=document.body.appendChild(document.createElement("div"));
flDiv.setAttribute("id","DCLK_FLDiv1");
flDiv.style.position="absolute";
flDiv.style.top="0";
flDiv.style.left="0";
flDiv.style.width="1px";
flDiv.style.height="1px";
flDiv.style.display="none";
flDiv.innerHTML='<iframe id="DCLK_FLIframe1" src="http://12345678.fls.doubleclick.net/activityi;src=12345678;type=123;cat=456;qty=' + qty + ';cost=' + cost + ';u1=' + u1 + ';ord='+ ord + '?" width="1" height="1" frameborder="0"><\/iframe>';
}
//]]>
</script>
</head>
<body>
<!-- This is an example of a "onclick" call on a anchor tag -->
<a href="http://address_of_page_to_load_or_file_to_download" onclick="FLOOD4(2, 100.34, 'testu1', 'testorderid');" target="_blank">Click here to test the tag</a>
</body>
