//ÏÔʾmodal screen
function showModalScreen(backurl,isLogin){
	if(isLogin == 1){
		if(backurl.indexOf("fri_mes") > 0){
			window.open(backurl);
		}else{
			window.location.href = backurl;
		}
		return;
	}

	var loginForm = document.getElementById("loginForm");
	loginForm.backurl.value = "http://club.tom.com/in.php?backurl=" + encodeURIComponent(backurl);
	id = "modalScreen";
	var w = 0, h = 0;
	w = document.documentElement.scrollWidth || document.body.scrollWidth || window.scrollWidth || 0;
	h = document.documentElement.scrollHeight || document.body.scrollHeight || window.scrollHeight || 0;

	var sc = document.getElementById(id);
	sc.style.width = w + "px";
	sc.style.height = h + "px";
	sc.style.display = "block";
	showLoginDiv();
}

//Òþ²Ømodal screen
function hideModalScreen() {
    id = "modalScreen";
	var sc = document.getElementById(id);
	sc.style.display = "none";
}


function showLoginDiv(id) {
    id = "loginDiv";
	var x = 0, y = 0, iw = 0, ih = 0;
	x = document.documentElement.scrollLeft || document.body.scrollLeft || window.scrollLeft || 0;
	y = document.documentElement.scrollTop || document.body.scrollTop || window.scrollTop || 0;
    iw = document.documentElement.clientWidth || document.body.clientWidth || window.innerWidth;
	ih = document.documentElement.clientHeight || document.body.clientHeight || window.innerHeight;

    var ld = document.getElementById(id);
	ld.style.display = "block";
	ld.style.left = (iw - ld.offsetWidth) / 2 + x + "px";
	ld.style.top = (ih - ld.offsetHeight) / 2 + y + "px";
}

function hideLoginDiv() {
    id = "loginDiv";
    var ld = document.getElementById(id);
    ld.style.display = "none";
	hideModalScreen();
}