ns4 = (document.layers)? true:false
ie4 = (document.all)? true:false

function moveBy(obj,x,y) {
	if (ns4) block = document.obj
	if (ie4) block = obj.style
	block.xpos = parseInt(block.left)
	block.ypos = parseInt(block.top)

	block.xpos += x
	block.left = block.xpos
	block.ypos += y
	block.top = block.ypos
}

window.moveTo(0,0);
quedan_a = (screen.availWidth-730)/2;
quedan_b = (screen.availHeight-450)/2;

if (document.all) {
  top.window.resizeTo(screen.availWidth,screen.availHeight);
} else if (document.layers||document.getElementById) {
  if (top.window.outerHeight<screen.availHeight||top.window.outerWidth<screen.availWidth){
    top.window.outerHeight = screen.availHeight;
    top.window.outerWidth = screen.availWidth;
  }
}