[tsigel]

ArrCenter = Array(100,100);


for (i=0; i<ArrCenter.length; i=i+2)
ctx.drawImage(Ugo, ArrCenter[i], ArrCenter[i+1] );

А почему не так:

var ArrCenter = [100,100];
ctx.drawImage(Ugo, ArrCenter[0], ArrCenter[1] );