Scrape Source Code of another domain client-side

I need an script that scrape CLIENT SIDE source code from another domain. You can write this script with an unsigned java applet (i absolutly need no prompt), javascript or another web language but only client-side, not server side like php,asp ... For YQL, it don't work for the website that i need (it's considered like bot and it's often blocked). Example : on [login to view URL] is the website containing the script who scrape [login to view URL] source code. You can verify your script with a website like [login to view URL] or http://www.canyouseeme.org. I need to test with a demo before choosing a bider.