// tV: ToggleVisibility
function tV(imgName) {
  var divName;  
  divName = "div" + imgName.substring(3)

  if(document.getElementById(divName).style.display == "none" ||
     document.getElementById(divName).style.display == null) { 
    document.getElementById(divName).style.display = "block";
	document.getElementById(imgName).src ="images/dot101.gif";
  }
  else { 
    document.getElementById(divName).style.display = "none"; 
	document.getElementById(imgName).src ="images/dot102.gif";
  }
}


// Overlay
function overlay(curobj, subobjstr, opt_position) {
  if (document.getElementById)  {
    var subobj=document.getElementById(subobjstr)
	subobj.style.display=(subobj.style.display!="block")? "block" : "none"
	var xpos=getposOffset(curobj, "left")+((typeof opt_position!="undefined" && opt_position.indexOf("right")!=-1)? -(subobj.offsetWidth-curobj.offsetWidth) : 0) 
	var ypos=getposOffset(curobj, "top")+((typeof opt_position!="undefined" && opt_position.indexOf("bottom")!=-1)? curobj.offsetHeight : 0)
	subobj.style.left=xpos+"px"
	subobj.style.top=ypos+"px"
	return false
  }
  else
	return true;
}

function overlayclose(subobj) {
  document.getElementById(subobj).style.display="none"
}