function getCookie(cookieName) {
var cookieString = document.cookie;
var start = cookieString.indexOf(cookieName + '=');
// 加上等号的原因是避免在某些 Cookie 的值里有
// 与 cookieName 一样的字符串。
if (start == -1) // 找不到
return null;
start += cookieName.length + 1;
var end = cookieString.indexOf(';', start);
if (end == -1) return unescape(cookieString.substring(start));
return unescape(cookieString.substring(start, end));
}
function exit(){
var expdate = new Date(); 
expdate.setTime(expdate.getTime() - (86400 * 1000 * 1)); 
setCookie("MyCookie", "", expdate); 
window.location.reload();
}
function setLogin(){
var myCookie=getCookie("MyCookie");
//alert(myCookie);
if(myCookie!=null){
document.getElementById('loginDiv').innerHTML="<a href=\"javascript:exit()\" onmouseout=\"MM_swapImgRestore()\" onmouseover=\"MM_swapImage('Image16','','images/main/btn_0402_1b.gif',0)\"><img src=\"images/main/btn_0403_2.gif\" name=\"Image16\" width=\"242\" height=\"47\" border=\"0\" id=\"Image16\" /></a>";//</td>"+
//"</tr>"+
//"</table>";
}else{
document.getElementById('loginDiv').innerHTML="<a href=\"register\/login.html\" onmouseout=\"MM_swapImgRestore()\" onmouseover=\"MM_swapImage('Image16','','images/main/btn_0403_1b.gif',0)\"  target=\"_blank\"><img src=\"images/main/btn_0403_1.gif\" name=\"Image16\" width=\"242\" height=\"47\" border=\"0\" /></a>";	
}
}
function setCookie (name, value, expires) { 
	document.cookie = name + "=" + escape(value) + ";expires=" + expires.toGMTString() + "; path=/"; 
	}
function openWindow(u,n,w,h)
{
//openWindow('event/assert.html','gg',617,660)
var windowLeft = (window.screen.availWidth - w)/2;
var windowTop = (window.screen.availHeight - h)/2;
args = "left="+windowLeft+",top="+windowTop+",width="+w+",height="+h+",resizable=yes,scrollbars=yes,status=1";
window.open(u,n,args);
}
function MM_preloadImages() { //v3.0
var d=document; if(d.images){ if(!d.MM_p) d.MM_p=new Array();
var i,j=d.MM_p.length,a=MM_preloadImages.arguments; for(i=0; i<a.length; i++)
if (a[i].indexOf("#")!=0){ d.MM_p[j]=new Image; d.MM_p[j++].src=a[i];}}
}
function MM_swapImgRestore() { //v3.0
var i,x,a=document.MM_sr; for(i=0;a&&i<a.length&&(x=a[i])&&x.oSrc;i++) x.src=x.oSrc;
}
function MM_findObj(n, d) { //v4.01
var p,i,x;  if(!d) d=document; if((p=n.indexOf("?"))>0&&parent.frames.length) {
d=parent.frames[n.substring(p+1)].document; n=n.substring(0,p);}
if(!(x=d[n])&&d.all) x=d.all[n]; for (i=0;!x&&i<d.forms.length;i++) x=d.forms[i][n];
for(i=0;!x&&d.layers&&i<d.layers.length;i++) x=MM_findObj(n,d.layers[i].document);
if(!x && d.getElementById) x=d.getElementById(n); return x;
}
function MM_swapImage() { //v3.0
var i,j=0,x,a=MM_swapImage.arguments; document.MM_sr=new Array; for(i=0;i<(a.length-2);i+=3)
if ((x=MM_findObj(a[i]))!=null){document.MM_sr[j++]=x; if(!x.oSrc) x.oSrc=x.src; x.src=a[i+2];}
}