// toggle visibility >>> taken from zeldman.com. 
//Used under the paragraph in his copyright statement [http://www.zeldman.com/copyright/] : 
//"Feel free to view source, learn from techniques used, and modify some of them to suit your projects. 
// But do not reproduce this design as-is and claim it to be your own." 

function toggle( targetId ){
  if (document.getElementById){
  		target = document.getElementById( targetId );
  			if (target.style.display == "none"){
  				target.style.display = "";
  			} else {
  				target.style.display = "none";
  			}
  	}
}