var basic_width=1000;

function start_intro() {
	var overlay=LT_get_object("div","overlay");
	if (!LT_read_cookie("visited")) {
		var middle=LT_get_object("div","middle_panel");
		var mpos=LT_get_absolute_position(middle);
		overlay.style.left=mpos[0];
		overlay.style.display="block";
		setTimeout("resize_overlay()",6100);
	}
	else {
		//overlay.style.visibility="hidden";
		overlay.style.display="none";
	}
	LT_write_cookie("visited","yes",0);
}

function resize_overlay() {
	var intro=LT_get_object("div","intro_panel");
	var middle=LT_get_object("div","middle_panel");
	intro.style.backgroundColor="white";
	intro.style.width="600px";
	intro.style.height="800px";
	intro.innerHTML="";
	var c=setInterval(function() {
		if (parseInt(intro.style.width)<basic_width) {
			intro.style.width=parseInt(intro.style.width)+20+"px";
		}
		else {
			clearInterval(c);
			hide_overlay();
		}
	},50);
}

function hide_overlay() {
	var eo=100;
	var oo=1;
	var overlay=LT_get_object("div","overlay");
	var c=setInterval(function() {
		if ((eo>0) || (oo>0)) {
			overlay.style.filter="alpha(opacity="+eo+")";
			overlay.style.opacity=oo;
			eo=eo-10;
			oo=oo-0.1;
		}
		else {
			clearInterval(c);
			//overlay.style.visibility="hidden";
			overlay.style.display="none";
		}
							   },50);
}