function autofitwin()
{ 
	var width1 = maintb.offsetWidth+ 30;     
	var height1 = maintb.offsetHeight+ 50;  
	
	if (width1 < 400) 
	width1 = 400; 
	if (width1 > screen.width) 
	width1 = screen.width; 
	
	if (height1 < 400) 
	height1 = 400; 
	if (height1 > screen.height) 
	height1 = screen.height; 
	window.resizeTo(width1,height1); 
}