function page_block_toggle(block_name){
	var block_property = $('#'+block_name+'-block h1 a.toggle b.switch');
	var block_content = $('#'+block_name+'-block div.block-content');
	
	var date = new Date(), sign;
	
	
	if(block_property.html() == '+'){
		sign = '-';
		block_content.slideDown(400);
	}
	else{
		sign = '+';
		block_content.slideUp(400);
	}
	
	block_property.html(sign);
	date.setTime(date.getTime()+((sign == '+' ? 2 : -1)*24*60*60*1000));
	document.cookie = block_name + '=' + (sign == '+' ? 'show' : '') + '; expires=' + (sign == '+' ? date.toGMTString() : '-1' ) + '; path=/';
}

function readCookie(name) {
	var nameEQ = name + "=";
	var ca = document.cookie.split(';');
	for(var i=0;i < ca.length;i++) {
		var c = ca[i];
		while (c.charAt(0)==' ') c = c.substring(1,c.length);
		if (c.indexOf(nameEQ) == 0) return c.substring(nameEQ.length,c.length);
	}
	return null;
}