Dynamic Image Replacement through call rail phone call tracking plugins in wordpress

Dynamic Image Replacement through call rail phone call tracking plugins in wordpress

I want to dynamically swap an image that contains a phone number.
I followed steps given in http://www.callrail.com/docs/web-integration/dynamic-number-insertion/images/ but images not swapped.
I installed plugin CallRail Phone Call Tracking and set the api key through call rail account and paste the javascript code in the footer of the page.
I saved the image of destination number tollfree.png in the image folder on the webserver wiith your prescribed naming convention i.e tollfree.8005676745.png
Then I saved the tracking numbers images with the same naming convention i.e tollfree.8889975025.png (8889975025 is tracking no. ) in the same image folder on the webserver.
Then I replaced the references i.e url("images/TollFreeOverlay.png") to url("images/TollFreeOverlay.8005676745.png")
Earlier code :
<div id="main"><div id="tollfreeoverlay" ></div>
and *given the reference through css *
#tollfreeoverlay {
background: url("images/TollFreeOverlay.8005676745.png") no-repeat
scroll 0px 0px transparent;
height: 32px;
position: absolute;
right: -120px;
top: -310px;
width: 540px;
z-index: 99;
}
After that I moved it to an inline style inside the body i.e
<div style="background:url(images/TollFreeOverlay.8005676745.png) no-repeat scroll 0 0 transparent; height: 32px; position: absolute; right: -120px; top:-310px; width: 540px; z-index: 99"></div>
other images also saved in the same folder with the same naming convention but still image not swapped....
When i search my website through google search image didn't swap bt in call rail account it maintain the log that i search through google organic. 888-997-49826 minutes agoGoogle Organic I want to swap the images as per callrail logs.So plz suggest the solution for the same