I can't quite find an error with my code. Someone suggested Salesforce doesn't allow Iframes anymore? Can anyone make any suggestinos or reccomendations to this code? I am just trying to get a VF page to display an Iframe of webcontent on the Account page layout. (Notice I have used a merge field to find the SRC of the website.)

<apex:page standardController="Account" sidebar="true" >
<apex:iframe frameborder="true" width="1000px" height="800px"
src="{!Account.urlfield__c}" scrolling="true"
id="EmployeeRefer"/>
</apex:page>