function centerPopUp( url, name, width0, height0, scrollbars ) {

	if( scrollbars == null ) scrollbars = "1"

        if (width0=="maxX") width0 = 700;
        if (height0=="maxY") height0 = 500;
        
        width = parseFloat(width0) + 25;
        height = parseFloat(height0) + 25;

        if (parseFloat(width) > 700) width = '700';
        if (parseFloat(height) > 500) height = '500';

	str  = "";
	str += "resizable=1,";
	str += "scrollbars=" + scrollbars + ",";
	str += "width=" + width + ",";
	str += "height=" + height + ",";

	if ( window.screen ) {
		var ah = screen.availHeight - 30;
		var aw = screen.availWidth - 10;

		var xc = ( aw - width ) / 2;
		var yc = ( ah - height ) / 2;

		str += ",left=" + xc + ",screenX=" + xc;
		str += ",top=" + yc + ",screenY=" + yc;
	}
        tmp = Math.round((Math.random() * (100000 - 1)));
	window.open( url, name+tmp, str );
} // End CenterPopUp