Here is one more errror result
Response message: javax.script.ScriptException: sun.org.mozilla.javascript.internal.WrappedException: Wrapped org.openqa.selenium.WebDriverException: com.gargoylesoftware.htmlunit.ScriptException: TypeError: Cannot set property "Billing" of undefined to "[object Object]" (
https://www.xxxxxxxxxxl.com/MERCHANTPAYMENTWEB-640-20140419-1/Checkout/js/billing.js#1)
Build info: version: '2.39.0', revision: '14fa800511cc5d66d426e08b0b2ab926c7ed7398', time: '2013-12-16 13:18:38'
System info: host: 'US154954', ip: '10.180.146.215',
os.name: 'Windows 7', os.arch: 'x86', os.version: '6.1', java.version: '1.6.0_38'
Driver info: driver.version: HtmlUnitDriver (<Unknown source>#14) in <Unknown source> at line number 14