var is_ns = (navigator.appName.indexOf("Netscape") != -1);
var d = document;
window.onresize = set_layer_pos;

lay_main = d.getElementById?d.getElementById("main_lay"):d.all?d.all["main_lay"]:d.layers["main_lay"];
lay_main = lay_main.style;
lay_main_w = clean_css_px(lay_main.width);
lay_main_h = clean_css_px(lay_main.height);
lay_main.visibility = "visible";

set_layer_pos();

function set_layer_pos()
	{if (!is_ns) 
		{curr_w = d.body.offsetWidth;
		curr_h = d.body.offsetHeight;
		}
	else 
		{curr_w = window.innerWidth;
		curr_h = window.innerHeight;
		}
	
	new_pos_l = (curr_w / 2) - (lay_main_w / 2);
	new_pos_t = (curr_h / 2) - (lay_main_h / 2);
	
	lay_main.left = new_pos_l + "px";
	lay_main.top = new_pos_t + "px";
	}


function clean_css_px(input)
	{if ((pos = input.indexOf("px")) != -1)
		{input = input.substr(0,pos);}
	input = Number(input);
	return input;
	}