The drop-down box displays only the values in the initial drop-down box and the JSON returns the intersection of the array

First we can traverse dropdown

var array = new Array ();

$ ("#select option"). each (function (j) {

array[j]=$ (This). Val ();
$ ("#select option[value=" +this.value+ "]"). Remove ();
});

The values in the drop-down box are stored in an array and then move, and then compared to the array in JSON

for (var i = 0;i<accountnoarr.length;i++) {
for (Var k=0;k<array.length;k++) {
if (Accountnoarr[i].accountno==array[k]) {
$ ("#Select "). Append ("<option value= '" +array[k]+ ">" +array[k]+ "</option>");
}
}
}

Put the same append in the Select.

var temp = "AA";

$ ("#select option"). Filter (function () {
return $ (this). val () = = temp; The value of option for select is equal to Temp (AA).
}). Prop (' selected ', true). Text ();

This is directly the description of the Select.

The drop-down box displays only the values in the initial drop-down box and the JSON returns the intersection of the array