shown=''
function OpenFile(url, wd, ht) {
var prm = 'scrollbars=no,status=no, high,width=' + wd + ',height=' + ht ;
if( shown=='' || shown.closed) {
	shown=window.open(url,'OpenFile',prm);
}
else{ 
	shown.close();
	shown=window.open(url,'OpenFile',prm);
}
}

function hiddenLayer(id) {
document.getElementById(id).border = 0 ;
} 

function showLayer(id) {
document.getElementById(id).border = 2 ;
}

function ShowWin(url,x,y,name,isscrollbars) {
cx=screen.width/2-(x / 2);
cy=screen.height/2-(y/2);
isscrollbars=(isscrollbars=="no")?"no":"yes";
window.open(url,name,"toolbar=no,status=no,directories=no,menubar=no,resizable=yes,width="+x+",height="+y+",scrollbars="+isscrollbars+",top="+cy+",left="+cx);
}