Drop Down menu if condition

[MXKS]

I want to Select Black And its show Black in Dropdown menu, when i click dropdown menu its show red only---

Step 1:- I Select Black in Drop Down Menu

Step 2:- Alert:- You have selected Black

My If condition is not satisfied, How to put right condition of if 

var dlgMain = new Window("dialog","CCCCCCC", undefined, { closeButton:true} )
dlgMain.marginLeft = 15;
dlgMain.center();
dlgMain.orientation = "row";

var dropdown7_array = ["Black","Red","White","Blue","Green"];
var dropdown7 = dlgMain.add("dropdownlist", undefined, undefined, {name: "dropdown7", items: dropdown7_array});
dropdown7.selection = 0;

dlgMain.show();

if(dropdown7.selection==dropdown7.items);
{
alert("red");
}

[Cavin House]

// DIALOG
// ======
var dialog = new Window("dialog");
    dialog.text = "Color Nippon";
    dialog.orientation = "column";
    dialog.alignChildren = ["center","top"];
    dialog.spacing = 10;
    dialog.margins = 16;

// PANEL1
// ======
var panel1 = dialog.add("panel", undefined, undefined, {name: "panel1"});
    panel1.text = "Color Change";
    panel1.orientation = "column";
    panel1.alignChildren = ["left","top"];
    panel1.spacing = 10;
    panel1.margins = 10;

var statictext1 = panel1.add("statictext", undefined, undefined, {name: "statictext1"});
    statictext1.text = "Please choose color";

var dropdown1_array = ["Choose","BS 9102","OW001","OW002","OW003","OW004","OW005","OW006","OW007","OW008"];
var dropdown1 = panel1.add("dropdownlist", undefined, undefined, {name: "dropdown1", items: dropdown1_array});
    dropdown1.selection = 0;
    dropdown1.preferredSize.width = 100;
    dropdown1.alignment = ["center","top"];

var button1 = panel1.add("button", undefined, undefined, {name: "button1"});
    button1.text = "Ok";
    button1.alignment = ["center","top"];
    button1.onClick = function(){
    dialog.close()
      $.evalFile(File($.fileName).parent.fsName  + "/folder_color/"+ dropdown1.selection+".jsx");
   alert(dropdown1.selection);
 }
dialog.show();

please help me to fix the above code error, can't get the dropdown1.selection value, I put the dropdown1.selection value in “+ dropdown1.selection +” there is an error

[Kukurykus]

dropdown1.selection.text

[Cavin House]

Thank you for supporting me

[jazz-y]

typeof dropdown1.selection == 'object'

use dropdown1.selection.toString() or dropdown1.selection.text

[Kukurykus]

Or:

unescape(dropdown1.selection)

You can also check few things by:

uneval(dropdown1.selection)

[Cavin House]

Thank you 

[Kukurykus]

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