function wndshow(str_wndname)
{
	var windowProperties = "";
	var windowWidth;
	var windowHeight;
	windowWidth = 620;
	windowHeight = 500;
	windowProperties += 'width='+windowWidth+',height='+windowHeight;
	windowProperties += ',left='+(screen.availWidth/2 - windowWidth/2);
	windowProperties += ',top='+(screen.availHeight/2 - windowHeight/2);
	windowProperties += ',scrollbars=1';
	window.open(str_wndname+".htm", "", windowProperties);
}