function unGreyOutPage() {
	document.getElementById("pageCover").style.display="none";	
}


function greyOutPage() {

	var pageWidth='100%';
	var pageHeight='100%';
       
	if( document.body && ( document.body.scrollWidth || document.body.scrollHeight ) ) {
		pageWidth = document.body.scrollWidth+'px';
		pageHeight = document.body.scrollHeight+'px';
	} else if( document.body.offsetWidth ) {
		pageWidth = document.body.offsetWidth+'px';
		pageHeight = document.body.offsetHeight+'px';
	}

	document.getElementById("pageCover").style.width=pageWidth;	
	document.getElementById("pageCover").style.height=pageHeight;

	document.getElementById("pageCover").style.display="block";	

}