function boom(n) {
       if (window.top.moveBy) {
       for (i = 10; i > 0; i--) {
       for (j = n; j > 0; j--) {
       window.top.moveBy(0,i);
       window.top.moveBy(i,0);
       window.top.moveBy(0,-i);
       window.top.moveBy(-i,0);
       }
       }
       }
       }
       function callJS(jsStr) {
       return eval(jsStr)
       }