Update public/js/paperfilter.js

public/js/paperfilter.js

@@ -6,10 +6,16 @@ var state2019 = 0
 var stateall = 0 
 var state = 0
 var count = 0
-
+var activeyear = null ; 
 
 function filter(year){
     
+
+    if (activeyear === year) {
+        // Clicking on the same button again, do nothing
+        return;
+    }
+    
     var new_row = document.getElementById("cont_paper")
     new_row.innerHTML = "";
     document.getElementById("nextblock").style.display = "none"
@@ -261,7 +267,8 @@ function filter(year){
             state2023= 0 
 			stateall = 1
         }
-        
+        //Update the value of the activeyear 
+        activeyear= year
    
    } else if (state == 1) {
        /* if (year == "2020") {
@@ -303,5 +310,9 @@ function filter(year){
         }else if(lang_setting == "2" ){
             document.getElementById("filterall").innerHTML = "Alles" 
         }
+        //Update the value of the activeyear 
+        activeyear= year
     }
+
+    
 }