function openWindow($url) {
	var $width=900;
	var $height=600;
	var $xpos = (screen.width/2)-($width/2);
	var $ypos = (screen.height/2)-($height/2);
	window.open($url,'mywindow','width='+$width+',height='+$height+',left=0,top=100,screenX='+$xpos+',screenY='+$ypos+',resizable=no');
}
function openWindowPort($url) {
	var $width=498;
	var $height=700;
	var $xpos = (screen.width/2)-($width/2);
	var $ypos = (screen.height/2)-($height/2);
	window.open($url,'mywindow','width='+$width+',height='+$height+',left=0,top=100,screenX='+$xpos+',screenY='+$ypos+',resizable=no');
}