var SelfRegWindow = null;
  
function self_registration(ProductCode,Company) {

if(SelfRegWindow != null)
    SelfRegWindow.close();
   
var URL = "https://tescohomephone.hsntech.com/tesco/OnLineRegistrationForm.cfm?FuseAction=Signupform&ProductCode="+ProductCode+"&Company="+Company;
   
SelfRegWindow = window.open(URL,"SelfRegWindow","scrollbars=yes,resizable=yes,status=yes,width=633,height=600,left=50,screenX=0,top=50,screenY=0");
}