centerDiv('main_area');
centerDiv('bottom_link_area');
centerDiv('bottom_info_area');

function centerDiv(divid) {
	div = document.getElementById(divid);
	width = 1000;
	height = 630;
	
	//	condition for IE and FF
	if (document.all?true:false)
	{
	  //var top = document.body.clientHeight;
	  var left = document.body.clientWidth;
	} else
	{
	  //var top = window.innerHeight;
	  var left = window.innerWidth;
	}
    
	//top = ((top - height)/2) + offset[1];
        left = (left - width)/2;
	if (left < 0) left = 0;
    
	//div.style.width=width+'px';
	//div.style.height=height+'px';
	//div.style.top=top+'px';
	div.style.left=left+'px';
}