var	popUp;

function openPopUp( url, windowname, WIDTH, HEIGHT )
{
	var x;
	var y;

	if( popUp && !popUp.closed ) 
		popUp.close();

	if( document.all ) {
    	x = window.screenLeft;
		y = window.screenTop;
	} else {
		x = window.screenX;
		y = window.screenY;
	}


	x = Math.round( (screen.availWidth - WIDTH) / 2) ;
	y = Math.round( (screen.availHeight - HEIGHT) / 2);

	popUp = window.open( url, windowname,'width='+WIDTH+',height='+HEIGHT+',top='+y+',left='+x+',resizable=yes,scrollbars=no' );
	return false;
}


function openScrollPopUp( url, windowname, WIDTH, HEIGHT )
{
	var x;
	var y;

	if( popUp && !popUp.closed ) 
		popUp.close();

	if( document.all ) {
    	x = window.screenLeft;
		y = window.screenTop;
	} else {
		x = window.screenX;
		y = window.screenY;
	}


	x = Math.round( (screen.availWidth - WIDTH) / 2) ;
	y = Math.round( (screen.availHeight - HEIGHT) / 2);

	popUp = window.open( url, windowname,'width='+WIDTH+',height='+HEIGHT+',top='+y+',left='+x+',resizable=yes,scrollbars=yes' );
	return false;
}