function openWindow(url,size) {
	agent = navigator.userAgent;
	windowName = "_blank";
	params  = "";
	params = "top=25,";
	params += "screenY=25,";
	params += "left=25,";
	params += "screenX=25,";
	params += "toolbar=1,";
	params += "location=1,";
	params += "directories=0,";
	params += "status=0,";
	params += "menubar=1,";
	params += "scrollbars=1,";
	params += "resizable=1,";
	if(size == 1) {
	params += "width=450,";
	params += "height=300";
	}
	if(size == 2) {
	params += "width=520,";
	params += "height=350";
	}
	if(size == 3) {
	params += "width=700,";
	params += "height=450";
	}
	if(size == 4) {
	params += "width=640,";
	params += "height=580";
	}
	win = window.open(url, windowName , params);
	win.focus();
}