/**************************************

popup full screen window

***************************************/
/*
function popwin(url , name , margin )
{
	var subtractheight;
	if( screen.height != screen.availHeight )
	{
		subtractheight = screen.height - screen.availHeight;
	}else{
		subtractheight = margin;
	}

	var popwin= window.open(url,name,'left='+subtractheight+',top='+subtractheight+',width=500,height=500');
	popwin.resizeTo(parseInt(screen.width-subtractheight*2,10),parseInt(screen.height-subtractheight*2,10));
}
*/
function popwin(url , name , margin )
{
	var ValidWidth  = screen.availWidth;
	var ValidHeight = screen.height - ( (screen.height == screen.availHeight && screen.width == screen.availWidth)?margin:(screen.height - screen.availHeight) );

	var popwin= window.open(url,name,'left='+0+',top='+0+',width='+640+',height='+480+'');
	popwin.resizeTo(ValidWidth,ValidHeight);

}