$("curtain").oncontextmenu=curtainContextMenu;


function curtainContextMenu()
{
return false;
}


function curtainHide()
{
$("curtain").style.display="none";
}


function curtainResize()
{
var curtainWidth=parseInt(document.body.offsetWidth);
var curtainHeight=parseInt(document.body.offsetHeight);
$("curtain").style.width=curtainWidth+"px";
$("curtain").style.height=curtainHeight+"px";
}


function curtainShow()
{
curtainResize();
$("curtain").style.display="block";
}