try to draw 1000*1000 svg grig

src/arenas/tron/js.js

@@ -4,15 +4,20 @@ function createElem(type,attributes){
     {elem.setAttribute(i,attributes[i]);}
     return elem;
 }
-
+function createElemNs(type,attributes){
+    var elem=document.createElement(type);
+    for (var i in attributes)
+    {elem.setAttributeNs(i,attributes[i]);}
+    return elem;
+}
 
 
 function tron(bot1,bot2,xdcheck){
 	
-        var mapImg = document.getElementById("map");
-
-	var rect=createElem('rect',{'x':'10','y':'10','width':'50','height':'80','style':'stroke:#000000; fill:none;'});
+        var svg = document.getElementById("map");
+	var svgDoc = svg.contentDocument;
+	var rect=createElemNs('rect',{'x':'10','y':'10','width':'50','height':'80','style':'stroke:#000000; fill:none;'});
 	
-	mapImg.appendChild(rect);
+	svgDoc.appendChild(rect);
   
 }