/* Popup 
x = 20;
y = 150;
function setVisible(obj)
{
	obj = document.getElementById(obj);
	obj.style.visibility = (obj.style.visibility == 'visible') ? 'hidden' : 'visible';
}*/
/* function placeIt(obj)
{
	obj = document.getElementById(obj);
	if (document.documentElement)
	{
		theLeft = document.documentElement.scrollLeft;
		theTop = document.documentElement.scrollTop;
	}
	else if (document.body)
	{
		theLeft = document.body.scrollLeft;
		theTop = document.body.scrollTop;
	}
	theLeft += x;
	theTop += y;
	obj.style.left = theLeft + 'px' ;
	obj.style.top = theTop + 'px' ;
	setTimeout("placeIt('layer1')",500);
}
window.onscroll = setTimeout("placeIt('layer1')",500); */
function myPopupRelocate() {
 var scrolledX, scrolledY;
 if( self.pageYOffset ) {
   scrolledX = self.pageXOffset;
   scrolledY = self.pageYOffset;
 } else if( document.documentElement && document.documentElement.scrollTop ) {
   scrolledX = document.documentElement.scrollLeft;
   scrolledY = document.documentElement.scrollTop;
 } else if( document.body ) {
   scrolledX = document.body.scrollLeft;
   scrolledY = document.body.scrollTop;
 }

 var centerX, centerY;
 if( self.innerHeight ) {
   centerX = self.innerWidth;
   centerY = self.innerHeight;
 } else if( document.documentElement && document.documentElement.clientHeight ) {
   centerX = document.documentElement.clientWidth;
   centerY = document.documentElement.clientHeight;
 } else if( document.body ) {
   centerX = document.body.clientWidth;
   centerY = document.body.clientHeight;
 }

 var leftOffset = scrolledX + (centerX - 250) / 2;
 var topOffset = scrolledY + (centerY - 600) / 2;

 document.getElementById("mypopup").style.top = topOffset + "px";
 document.getElementById("mypopup").style.left = leftOffset + "px";
}

function fireMyPopup() {
 myPopupRelocate();
 document.getElementById("mypopup").style.display = "block";
 document.body.onscroll = myPopupRelocate;
 window.onscroll = myPopupRelocate;
}