var timerlen=5;
var slideAniLen=500;
var timerID=new Array();
var startTime=new Array();
var obj=new Array();
var endHeight=new Array();
var moving=new Array();
var dir=new Array();

function slidedown(objname)
{
if(moving[objname])return;
if(document.getElementById(objname).style.display!="none")return;
moving[objname]=true;dir[objname]="down";
startslide(objname);
}

function slideup(objname)
{
if(moving[objname])return;
if(document.getElementById(objname).style.display=="none")return;
moving[objname]=true;
dir[objname]="up";
startslide(objname);
}

function startslide(objname){obj[objname]=document.getElementById(objname);
endHeight[objname]=parseInt(obj[objname].style.width);
startTime[objname]=(new Date()).getTime();

if(dir[objname]=="down"){obj[objname].style.width="1px";}
obj[objname].style.display="block";
timerID[objname]=setInterval('slidetick(\''+objname+'\');',timerlen);}

function slidetick(objname){var elapsed=(new Date()).getTime()-startTime[objname];if(elapsed>slideAniLen)
endSlide(objname)
else{var d=Math.round(elapsed/slideAniLen*endHeight[objname]);if(dir[objname]=="up")
d=endHeight[objname]-d;obj[objname].style.width=d+"px";}
return;}

function endSlide(objname){clearInterval(timerID[objname]);if(dir[objname]=="up")
obj[objname].style.display="none";obj[objname].style.width=endHeight[objname]+"px";delete(moving[objname]);delete(timerID[objname]);delete(startTime[objname]);delete(endHeight[objname]);delete(obj[objname]);delete(dir[objname]);return;}