//---------------------------------------------------------------------------------------------------------------------------------
function verticalAlign(){
	var height=document.getElementById('mainArea').offsetHeight;
	if(typeof window.innerWidth != 'undefined'){
		var detectedHeight=window.innerHeight;
	}else if(typeof document.documentElement != 'undefined' && typeof document.documentElement.clientWidth !='undefined' && document.documentElement.clientWidth != 0){							
		var detectedHeight=document.documentElement.clientHeight;
	}
	if(detectedHeight<height+1){
	document.getElementById('verticalAlign').style.height='0px';	
	}else{	
	document.getElementById('verticalAlign').style.height=Math.floor((detectedHeight-height)/2)+'px';	
	}
}
//---------------------------------------------------------------------------------------------------------------------------------