ie=document.all?1:0;
n=document.layers?1:0;
n6=(navigator.vendor == ("Netscape6") || navigator.product == ("Gecko"));
prediv=""

function makediv(target){
this.css=(n) ? eval('document.'+target):(n6 ?eval('document.getElementById("'+target+'").style'):eval('document.all.'+target+'.style'))
}

function open_div(target){
if(prediv!=""){close_div(prediv);}
thediv= new makediv(target)
thediv.css.visibility='visible'
prediv=target;
}
function close_div(target){
thediv= new makediv(target)
thediv.css.visibility='hidden'

}