Join five array values into a single array where all the array variable is same and the array contents are different javascript -

here have written javascript array (var a=[""]) consists of different values in each if condition, want array values stored in single array seperated comma(,). can me??

here javascript

<script>     function colorchange(id) {      var background = document.getelementbyid(id).style.backgroundcolor;      if (background == "rgb(255, 145, 0)") {         document.getelementbyid(id).style.background = "rgb(26,255,0)";     } else {         document.getelementbyid(id).style.background = "rgb(255, 145, 0)";     }      var elem = document.getelementbyid(id);      if (id == "select") {         if (elem.innerhtml == "ignore select") {             elem.innerhtml = "enable select";             var = ["select"]; //array returns select         } else {             elem.innerhtml = "ignore select";         }     }      if (id == "select1") {         if (elem.innerhtml == "ignore delete") {             elem.innerhtml = "enable delete";             var = ["delete"]; //array returns delete         } else {             elem.innerhtml = "ignore delete";         }     }      if (id == "select2") {         if (elem.innerhtml == "ignore insert") {             elem.innerhtml = "enable insert";             var = ["insert"]; //array returns insert         } else {             elem.innerhtml = "ignore insert";         }     }      if (id == "select3") {         if (elem.innerhtml == "ignore update") {             elem.innerhtml = "enable update";             var = ["update"]; //array returns update         } else {             elem.innerhtml = "ignore update";         }     }      if (id == "select4") {         if (elem.innerhtml == "ignore sleep") {             elem.innerhtml = "enable sleep";             var = ["sleep"]; //array returns sleep         } else {             elem.innerhtml = "ignore sleep";         }     } } </script> 

i want array return value stored in single array,the array should "var x=[select,delete,insert,update,sleep];",variable x contains values seperated comma(,) .how can using javascript?

create empty array @ start of function this:

var x = []; // doesn't *need* empty 

then add values call push function this:

x.push( "insert" );  

if want return array function write

return x; 

fyi: array values not actually separated comma's. how array values coded , displayed coder/user. each array element separate variable. example:

var x = [1,2,3]; // show popup array elements displayed separated default: comma alert( x );  // show popup array elements displayed separated semicolon alert( x.join(";") );