Modified Theme for my Website and it became broke

[mvlcek]

Now it's even weirder, now the website loads, but no design, only the header background (TF?!?!)...
Can someone help me out in this? I spent about 5 hours to design the website, may be a key was pressed in the wrong place\time and all that occurred... Help?

Just look at the HTML source of your site. The last line is:

Code:

Fatal error: Call to undefined function get_siteurl() in S:\TheDragonShare\theme\TDT\header.php on line 53

I think it should be get_site_url().