var rab,xy,z,x,y,za;
za=-1;
rab=Math.random()*(23/(Math.random()*10));
z=-1;
x=(Math.random()*180);
y=(Math.random()*180);
xy=x*y;

function construyeTabla(){
  docBody = document.getElementsByTagName("body").item(0);
  meTable = document.createElement("TABLE");
  meTable.setAttribute("height", "100%");
  meTable.setAttribute("width", "100%");
  meTable.setAttribute("border", "0");
  meTable.setAttribute("cellspacing", "0");
  meTable.id="ff";
  meTableBody = document.createElement("TBODY");
for (i = 0; i < 1; i++){
		row = document.createElement("TR");
		for (j = 0; j < y; j++){
		  cell = document.createElement("TD");
		  cell.setAttribute("height", "100%");
		  z++;
		  cell.id= z;
		  cell.setAttribute("cellspacing", "0");
		  cell.setAttribute("cellpadding", "0");
		  cell.setAttribute("bgColor", farbe(i,j));
		  //textVal = j;
		  //textNode = document.createTextNode(textVal);
		  //cell.appendChild(textNode);
		  row.appendChild(cell);
		}
	meTableBody.appendChild(row);
 }
	  meTable.appendChild(meTableBody);
	  docBody.appendChild(meTable);
	  
}
function farbe(i,j)  {
			za=(za)+rab+Math.sin(i);
			var r =Math.ceil(Math.random()*255);
			var g =Math.ceil(Math.random()*255);
			var b =Math.ceil(Math.random()*255);
			r = Number(r).toString(16);
			g = Number(g).toString(16);
			b = Number(b).toString(16);
			// document.write ((r)+"/")
			return ("#"+ r+g+b);
}