function HideContent(d) {
document.getElementById(d).style.display = "none";
}
function ShowContent(d) {
document.getElementById(d).style.display = "block";
}
function ReverseDisplay(d) {
if(document.getElementById(d).style.display == "none") { document.getElementById(d).style.display = "block"; }
else { document.getElementById(d).style.display = "none"; }
}

function popup(w,h, url){

	LeftPosition=(screen.width)?(screen.width-w)/2:100;
	TopPosition=(screen.height)?(screen.height-h)/2:100;
	settings='width='+(w)+',height='+(h)+',top='+TopPosition+',left='+LeftPosition;

  generator = window.open(url, "pupWindow", settings); 
  if (window.focus) {generator.focus()}
}