If any textbox is disabled then how to send the value to that box ?

Note- Use javascript because if any textbox is disabled then in that case sendKeys() method will not work.
ex- <input id="txt2" class="posStat" type="text" disabled="disabled" maxlength="100">

Reference Code-

import java.util.concurrent.TimeUnit;
import org.openqa.selenium.By;
import org.openqa.selenium.JavascriptExecutor;
import org.openqa.selenium.WebDriver;
import org.openqa.selenium.WebElement;
import org.openqa.selenium.firefox.FirefoxDriver;

public class Naukari{
    public static void main(String[] args)
    {
        WebDriver driver = new FirefoxDriver();
        driver.manage().timeouts().implicitlyWait(10,TimeUnit.SECONDS);
        driver.get("http://www.naukri.com");
        driver.findElement(By.partialLinkText("Post Resume")).click(); //click in post resume
        WebElement user= driver.findElement(By.xpath("//input[@id='txt2']")); //Enter your Email ID* : , textbox
        System.out.println(user.isEnabled()); //this will give false
        //user.sendKeys("hello1"); //if u will try this, this will fail
        ((JavascriptExecutor)driver).executeScript("document.getElementById('txt2').value='sanjay'"); //this is how , to use javascript to send value
        WebElement pass = driver.findElement(By.xpath("//input[@id='password']")); //this field is not disabled so for this sendKeys() method can be used.
        System.out.println(pass.isEnabled()); //this will print true
        pass.sendKeys("hello"); //this will send the value in, Create a Password for your account* :
}
}

What is the alternate way to send text in textbox of webpage with out using sendKeys() method ?

Note- Use Javascript to send text.

syntax-

((JavascriptExecutor)driver).executeScript("document.getElementById('attribute value of id').value='text which you want to pass'");

ex-
import java.util.concurrent.TimeUnit;
import org.openqa.selenium.JavascriptExecutor;
import org.openqa.selenium.WebDriver;
import org.openqa.selenium.firefox.FirefoxDriver;

public class WithoutSendKeys {
public static void main(String[] args) {
WebDriver driver = new FirefoxDriver();
driver.manage().timeouts().implicitlyWait(10, TimeUnit.SECONDS);
driver.get("https://accounts.google.com/ServiceLogin?sacu=1&scc=1...");
((JavascriptExecutor)driver).executeScript("document.getElementById('Email').value='sanjay'");
}
}