this is my answer:
- change btonClick type from "Submit" to "Button".
<input type="button" name="submit" id="btnClick" value="Click Me" önclick="GetValue()" />
- in function getValue():
function GetValue(){
var arrayOfAnchors = document.all.tags("meta");
var value1 = arrayOfAnchors[0].content;
document.getElementById('final').value= value1;
document.form[0].submit();
}