var head="display:''"
function doit(header){
var head=header.style
if (head.display=="none")
head.display=""
else
head.display="none"
}
//*******
//鼠标移入显示大图片
//*******
function yiru(t){    
    var ei = document.getElementById("big_image");
    ei.style.display = "block";
ei.innerHTML = '<img src="' + t.src + '" width="280px" height="280px" />';

ei.style.top =document.body.scrollTop+window.event.clientY+10+"px";

if(window.event.clientX-ei.style.left>100)
{
ei.style.right =event.offsetX+100+"px";
}


if(window.event.clientX-ei.style.right>100)
{
ei.style.right =event.offsetX-100+"px";
}
}
//*******
//鼠标移出隐藏大图片
//*******
function yichu(){
    var ei = document.getElementById("big_image");
    ei.innerHTML = "";
ei.style.display = "none";
}