function positionDialog() {
	var pageSize = getPageSize();
	var width = pageSize[0];
	var height = pageSize[1];
	$('#modal_bg').css('height',height + 100 + "px");
	$('#modal_bg').css('width',width + "px");
	//$('#modal').css('left',width/2 - ($('#modal').width()+50)/2 + "px");
}
function openModal(link) {
	//console.log(typeof link);
	if (typeof link != 'undefined') $('#modal').load(link.href);
	positionDialog();
	$('#modal').center({ vertical: false, horizontal: true } );
	$('#modal').css('display','block');
	$('#modal_bg').css('display','block');
	return false;
}

function openSmallModal(link) {
	$('#modal').width('430px');
	return openModal(link);
}
function closeModal() {
	$('#modal').css('display','none');
	$('#modal_bg').css('display','none');
	return false;
}
function getPageSize() {
	var xScroll, yScroll;
	if (window.innerHeight && window.scrollMaxY) {	
		xScroll = window.innerWidth + window.scrollMaxX;
		yScroll = window.innerHeight + window.scrollMaxY;
	} else if (document.body.scrollHeight > document.body.offsetHeight){ // all but Explorer Mac
		xScroll = document.body.scrollWidth;
		yScroll = document.body.scrollHeight;
	} else { // Explorer Mac...would also work in Explorer 6 Strict, Mozilla and Safari
		xScroll = document.body.offsetWidth;
		yScroll = document.body.offsetHeight;
	}
	var windowWidth, windowHeight;
	if (self.innerHeight) {	// all except Explorer
		if(document.documentElement.clientWidth){
			windowWidth = document.documentElement.clientWidth; 
		} else {
			windowWidth = self.innerWidth;
		}
		windowHeight = self.innerHeight;
	} else if (document.documentElement && document.documentElement.clientHeight) { // Explorer 6 Strict Mode
		windowWidth = document.documentElement.clientWidth;
		windowHeight = document.documentElement.clientHeight;
	} else if (document.body) { // other Explorers
		windowWidth = document.body.clientWidth;
		windowHeight = document.body.clientHeight;
	}	
	// for small pages with total height less then height of the viewport
	if(yScroll < windowHeight){
		pageHeight = windowHeight;
	} else { 
		pageHeight = yScroll;
	}
	// for small pages with total width less then width of the viewport
	if(xScroll < windowWidth){	
		pageWidth = xScroll;		
	} else {
		pageWidth = windowWidth;
	}
	arrayPageSize = new Array(pageWidth,pageHeight,windowWidth,windowHeight) 
	return arrayPageSize;
}