var popupObj = false;
var ieAlphaIdx = 0;

function popup_open(){
	popupObj = document.getElementById('popup');
	if(browser=="ie"){
		popupObj.style.filter = "Alpha(opacity=0)";
		popupObj.style.display="block";
		ieAlphaIdx = 0;
		fadeUpWin();
	}else{
		popupObj.style.opacity = 0;
		popupObj.style.display="block";
		fadeUp();
	}
}

function fadeUp () {
	fadeOpacity = parseFloat(popupObj.style.opacity);
	if(fadeOpacity > .88){
		popupObj.style.opacity = .99;
		clearTimeout(fadeTimer);
	}else{
		popupObj.style.opacity = fadeOpacity + .11;
		fadeTimer = setTimeout("fadeUp()",100);
	}
}

function fadeUpWin () {
	if(ieAlphaIdx > 88){
		popupObj.style.filter = "Alpha(opacity=99)";
		clearTimeout(fadeTimer);
	}else{
		ieAlphaIdx += 11;
		popupObj.style.filter = "Alpha(opacity=" + ieAlphaIdx +")";
		fadeTimer = setTimeout("fadeUpWin()",100);
	}
}

function popup_close(){
	document.getElementById('popup').style.display="none";
}