var MinHeight = 610;
var TopAndFooter = 175;

function Size(){
	if ($(window).height() > MinHeight) {
		$('.center2').css('height', ($(window).height() - TopAndFooter) + 'px')
	}
	else {
		$('.center2').css('height', (MinHeight - TopAndFooter) + 'px')
	}
}
$(document).ready(function(){
	Size()
});
$(window).resize (function(){
	Size()
})