var handle;
function start(){
	var obj = document.getElementById("tip");
	if (parseInt(obj.style.height)==0){
		obj.style.display="block";
		handle = setInterval("changeH('up')",2);
	}else{
		handle = setInterval("changeH('down')",2) 
	} 
}
function changeH(str){
	var obj = document.getElementById("tip");
	if(str=="up"){
		if (parseInt(obj.style.height)>200)
			clearInterval(handle);
	else
		obj.style.height=(parseInt(obj.style.height)+8).toString()+"px";
	}
	if(str=="down"){
		if (parseInt(obj.style.height)<8){
			clearInterval(handle);
			obj.style.display="none";
		}
	else  
		obj.style.height=(parseInt(obj.style.height)-8).toString()+"px"; 
	}
}
function showwin(){
	document.getElementsByTagName("html")[0].style.overflow = "hidden";
	start();
	document.getElementById("shadow").style.display="block";
}
function recover(){
	document.getElementsByTagName("html")[0].style.overflow = "auto";
	document.getElementById("shadow").style.display="none";
	document.getElementById("detail").style.display="none";  
}

function onload(){
	document.getElementById('tip').style.height='0px';
	start();
}