Hi, I have two sites (domain1 asp.net web application and domain2 perl web booking application). Currently, a user clicks a button on domain1 to start their journey, they are then sent to domain2. On domain2 the user clicks a button to complete their journey. This is what I want to do, when the user clicks the button on domain1 to start their journey, a cookie is saved and when the user clicks the button on domain2 to complete their journey the cookie is updated. This will allow me to record how many people who started the journey, completed it. I know cross domain cookies are an issue however i've heard of people using the image tag to get round this problem by placing a hidden image on the pages where the buttons are and setting it's src in script to a page elsewhere. I've seen solutions in php for this but i don't know php and need a .net or classic asp solution. I also need to send the cookie info to a database but thats the easy bit. Any ideas?? -- modified at 4:15 Tuesday 3rd July, 2007