// JavaScript Document

function Center_Div(Xwidth,Yheight,divid) {

	// First, determine how much the visitor has scrolled 
	
	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;
	}
	
	// Next, determine the coordinates of the center of browser's window
	
	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;
	}
	
	// Xwidth is the width of the div, Yheight is the height of the
	// div passed as arguments to the function:
	var leftoffset = scrolledX + (centerX - Xwidth) / 2;
	var topoffset = scrolledY + (centerY - Yheight) / 2;
	// The initial width and height of the div can be set in the
	// style sheet with display:none; divid is passed as an argument to // the function
	var o=document.getElementById(divid);
	var r=o.style;
	r.position='absolute';
	r.top = topoffset + 'px';
	r.left = leftoffset + 'px';
	r.display = "block";

}//END function