function ShowHideBlock(which){
	var hidedate = new Date();
	var showdate = new Date();
	hidedate.setTime(hidedate.getTime()+(1000*60*60*24*10));
	showdate.setTime(showdate.getTime()-(1000*60*60*24*10));
	var style2;
	if(document.getElementById){
		style2 = document.getElementById(which).style;
	}else if(document.all){
		style2 = document.all[which].style;
	}else{
		style2 = document.layers[which].style;
	}

	if(style2.display == 'block'){
		style2.display = 'none';
		document.cookie = which+'=1; expires='+hidedate.toGMTString()+'; path=/';
	}else{
		style2.display = 'block';
		document.cookie = which+'=; expires='+showdate.toGMTString()+'; path=/';
	}
}