function clickVisibleDiv(str) {
	if(document.getElementById("view_tab_"+str).style.display == "none"){
		document.getElementById("view_tab_"+str).style.display = "block";
		document.getElementById("simvol_"+str).innerHTML = "-";
	}else{
		document.getElementById("view_tab_"+str).style.display = "none";
		document.getElementById("simvol_"+str).innerHTML = "+";	
	}
}