function new_win(win_url, win_name, win_attr, win_size, max_width, max_height) {
	if (win_size==1) {
		left1 = Math.round(screen.availWidth * 0.075);
		top1 = 40;
		w1 = Math.round(screen.availWidth*0.85);
		h1 = Math.round((screen.availHeight-200));
		if ((max_width > 0) && (w1 > max_width)) {
			dif1 = w1-max_width;
			left1 = Math.round(left1+(dif1/2));
			w1 = max_width; }
		if ((max_height > 0) && (h1 > max_height)) {
			dif1 = h1-max_height;
			top1 = Math.round(top1+(dif1/2));
			h1 = max_height; }
		if (win_attr != '') { win_features = win_attr + ','; } else { win_features = '' }
		if (win_attr.indexOf("left=") < 0) {win_features = win_features+'left='+left1}
		if (win_attr.indexOf("top=") < 0) {win_features = win_features+',top='+top1}
		if (win_attr.indexOf("screenX=") < 0) {win_features = win_features+',screenX='+left1}
		if (win_attr.indexOf("screenY=") < 0) {win_features = win_features+',screenY='+top1}
		if (win_attr.indexOf("width=") < 0) {win_features = win_features+',width='+w1}
		if (win_attr.indexOf("height=") < 0) {win_features = win_features+',height='+h1}
	} else {
		win_features = win_attr;
	}
	// alert(win_features);
	win = window.open(win_url, win_name, win_features);
	win.focus();
	return win;
}

function popup_medium(win_url, win_name) {
	return new_win(win_url,win_name,'resizable=yes,scrollbars=yes,menubar=yes,toolbar=yes',1,800,800); return false;
}