Checkbox selection logic

This js restricts the selection from a group of checkboxes to four. If a fifth one is selected , then the first one whichever was selected will be unchecked.

A combination of js and jQuery.

 

// Restricting the vehicle selection to FOUR – Start
var vehList=new Array();
vehList[0]=””;
vehList[1]=””;
vehList[2]=””;
vehList[3]=””;

var vehObjList = new Array();
vehObjList[0]=””;
vehObjList[1]=””;
vehObjList[2]=””;
vehObjList[3]=””;

function restrictVeh(obj,name){
  var selVin = name;
  var remVeh = “”;
  var remObj;
  if($(obj).attr(’checked’)){
    for(var incr=0;incr <= 3 ; incr++){
      if(vehList[incr]==””){
      vehList[incr]=selVin;
      vehObjList[incr]=obj;
      break;
       }
       if(incr==3){
        remVeh = vehList[0];
        remObj = vehObjList[0];
        $(remObj).attr(’checked’,false);
        for(var cnt=0;cnt<3;cnt++){
       vehList[cnt]=vehList[cnt+1];
       vehObjList[cnt]= vehObjList[cnt+1];
        }
        vehList[3]=selVin;
        vehObjList[3]=obj;
       }
     }
  }else{
    for(var incr=0;incr <= 3 ; incr++){
      if(vehList[incr]==selVin){
      vehList[incr]=””;
      vehObjList[incr]=””;
      for(var cnt=incr;cnt<3;cnt++){
       vehList[cnt]=vehList[cnt+1];
       vehObjList[cnt]=vehObjList[cnt+1]
      }
      vehList[3]=””;
      vehObjList[3]=””;
       }
  
    }  
  }
/* for(var incr=0;incr <= 3 ; incr++){
   alert(vehList[incr]);
  }  */
}
// Restricting the vehicle selection to FOUR – End