Actionscript Event function for Dynamic Checkboxes

public function setStringData(event:Event):void{
if(event.currentTarget.selected)
{
selectedTables += “,” + event.currentTarget.label.toString() ;
var len:int = selectedTables.length;
//selectedTables = selectedTables.substr(1,len);
var str:String = selectedTables.substr(0,1);
var str1:String = selectedTables.substr(len,len-1);
if(str == ‘,’ ){
var len:int = selectedTables.length;
selectedTables = selectedTables.substr(1,len);
}else if(str1 == ‘,’)
{
var len:int = selectedTables.length;
selectedTables = selectedTables.substr(len,len-1);
}
}else
{
selectedTables = UnchekdRemoveQuery(event.currentTarget.label.toString());
selectedTables = UnchekdRemoveQuery(“,,”);
var len:int = selectedTables.length;
//selectedTables = selectedTables.substr(1,len);
var str:String = selectedTables.substr(0,1);
var str1:String = selectedTables.substr(len,len-1);
if(str == ‘,’ ){
var len:int = selectedTables.length;
selectedTables = selectedTables.substr(1,len);
}else if(str1 == ‘,’)
{
var len:int = selectedTables.length;
selectedTables = selectedTables.substr(len,len-1);
}
}
}