function openBlock(which){
	if(document.getElementById(which + "_closed").style.display == "block"){
		document.getElementById(which + "_closed").style.display = "none";
		document.getElementById(which + "_opened").style.display = "block";
	}else{
		document.getElementById(which + "_closed").style.display = "block";
		document.getElementById(which + "_opened").style.display = "none";
	}
}