// JavaScript Document
/**
	Uniwits System, 2011
	http://www.uniwits.com
**/

function adjust_mainfooter()
{
	var MCR=document.getElementById('MainContentRegion');
	var mainfooter_div_obj=document.getElementById('mainfooter_div');

	var windowHeight=UNIWITS.Toolbox.clientHeight();

	if (MCR.offsetHeight<windowHeight*0.7)
		MCR.style.height=Math.floor(windowHeight*0.7)+'px';

	if (windowHeight>MCR.offsetHeight)
		MCR.style.marginTop=(windowHeight-MCR.offsetHeight)/2.2+'px';

	var mfPos=UNIWITS.Toolbox.absPos(mainfooter_div_obj);
	var oldMarginTop=parseInt(mainfooter_div_obj.style.marginTop,10);
	var minVacantHeight=0;
	oldMarginTop=oldMarginTop?oldMarginTop:0;
	var mainContentHeight=mfPos.y-oldMarginTop;
	vacantHeight=windowHeight-mainContentHeight-mainfooter_div_obj.offsetHeight-2;
	try {
		if (MIN_MAINFOOTER_VACANT_HEIGHT)
			minVacantHeight=MIN_MAINFOOTER_VACANT_HEIGHT;
	} catch (e) {}
	if (vacantHeight>minVacantHeight)
		mainfooter_div_obj.style.marginTop=vacantHeight+"px";
	else
		mainfooter_div_obj.style.marginTop=minVacantHeight+"px";
}

UNIWITS.Toolbox.installWrapperEvent(window,'onload',adjust_mainfooter);
UNIWITS.Toolbox.installWrapperEvent(window,'onresize',adjust_mainfooter);

adjust_mainfooter();