Can only use Dialog box with input text once

[J.C.C.1]

Hey! I am creating a dialog window in an Adobe Photoshop Script to search my company's website, and I have run into an issue with the Text input field. I have the text input field working just fine the first time I run it, but if I try to change the value again it returns undefinied and if I try to run it a third time it does nothing. 

I think it is just overriding the edittext property. I have used some code from this forum https://community.adobe.com/t5/photoshop-ecosystem-discussions/script-ui-text-field-input/m-p/128995...
but I am still struggling to get a reusable text field. 
I just made the function an alert so that I wasn't opening a new chrome tab everytime I tested different code.
Here is the snippet of my code 

var panelWebsiteSearch = dialog.add("panel", undefined, undefined, {name: "Website Search"}); 
    panelWebsiteSearch.text = "Website Search"; 
    panelWebsiteSearch.preferredSize.width = (dialog.preferredSize.width-50); 
    panelWebsiteSearch.orientation = "row"; 
    panelWebsiteSearch.alignChildren = ["left","top"]; 
    panelWebsiteSearch.spacing = 10; 
    panelWebsiteSearch.margins = 10; 
    panelWebsiteSearch.alignment = ["left","top"]; 

var statictext1 = panelWebsiteSearch.add("statictext", undefined, undefined, {name: "statictext1"}); 
    statictext1.text = "Search https://www.website.com/"; 
    statictext1.alignment = ["left","top"]; 
var edittext1 = panelWebsiteSearch.add('edittext {properties: {name: "edittext1"}}'); 
    edittext1.text =  "Search Keywords";
    edittext1.preferredSize.width = 300; 
    edittext1.alignment = ["Right","top"];
    edittext1.value = edittext1; 

var buttonWebsiteSearch = panelWebsiteSearch.add("button", undefined, undefined, {name: "buttonWebsiteSearch"}); 
    buttonWebsiteSearch.text = "Search"; 
    buttonWebsiteSearch.alignment = ["right","center"];
    buttonWebsiteSearch.addEventListener('click', function (){
        edittext1.value = edittext1;
        edittext1 = edittext1.text;
        alert (edittext1);
        //system('start https://www.website.com/search/'+ edittext1 + '.html');
    },
        false);

 Thanks!

[jazz-y · Accepted solution]

buttonWebsiteSearch.addEventListener('click', function (){
        alert (edittext1.text);
        //system('start https://www.website.com/search/'+ edittext1.text + '.html');
},

¯\_(ツ)_/¯

[J.C.C.1]

Worked perfectly, thanks! 

Here is the code for anyone interested in the future. 

var dialog = new Window("dialog", undefined, undefined, {resizeable: true}); 
    dialog.text = "Reference Images"; 
    dialog.preferredSize.width = 700; 
    dialog.preferredSize.height = 700; 
    dialog.orientation = "column"; 
    dialog.alignChildren = ["left","top"]; 
    dialog.spacing = 10; 
    dialog.margins = 16; 


 var activeFileName = app.activeDocument.name.split("_")[0]  
// PANEL1
// ======
var panelWebsiteSearch = dialog.add("panel", undefined, undefined, {name: "Website Search"}); 
    panelWebsiteSearch.text = "Website Search"; 
    panelWebsiteSearch.preferredSize.width = (dialog.preferredSize.width-50); 
    panelWebsiteSearch.orientation = "row"; 
    panelWebsiteSearch.alignChildren = ["left","top"]; 
    panelWebsiteSearch.spacing = 10; 
    panelWebsiteSearch.margins = 10; 
    panelWebsiteSearch.alignment = ["left","top"]; 

var statictext1 = panelWebsiteSearch.add("statictext", undefined, undefined, {name: "statictext1"}); 
    statictext1.text = "Search https://www.yourwebsite.com/"; 
    statictext1.alignment = ["left","top"]; 
var edittext1 = panelWebsiteSearch.add('edittext {properties: {name: "edittext1"}}'); 
    edittext1.text =  "Search Keywords";
    edittext1.preferredSize.width = 300; 
    edittext1.alignment = ["Right","top"];
     

var buttonWebsiteSearch = panelWebsiteSearch.add("button", undefined, undefined, {name: "buttonWebsiteSearch"}); 
    buttonWebsiteSearch.text = "Search"; 
    buttonWebsiteSearch.alignment = ["right","center"];
    buttonWebsiteSearch.addEventListener('click', function (){
        var sku = edittext1.text
        sku = sku.replace(/\s+/g, '-').toLowerCase();   
        alert (sku)
       system('start https://www.yourwesbite.com/search/'+ sku + '.html');
},)