How to send Javascript variable to jsp page using AJAX?

[nagireddy123]

I have tried sending the value as shown(code), but no value is being caught in JSP.

It is showing null value in jsp page.

this is javascript/ajax code

var emp = document.getElementById("Employee").value;
var url_temp = "print_emp.jsp?Employee="+emp;
alert(url_temp);


var xmlhttp;
if (window.XMLHttpRequest)
{
	// code for IE7+, Firefox, Chrome, Opera, Safari
	xmlhttp=new XMLHttpRequest();
}
else
{// code for IE6, IE5
	xmlhttp=new ActiveXObject("Microsoft.XMLHTTP");
}
xmlhttp.onreadystatechange=function()
	{

	if (xmlhttp.readyState==4 && xmlhttp.status==200)
{
		document.getElementById("result_display").innerHTML=xmlhttp.responseText; 		
  		//document.getElementById(result_display).innerHTML="print_emp.jsp";
}
}
xmlhttp.open("GET",url_temp,true);
xmlhttp.send();


trying to read in jsp page as shown below, but no use.

String employee=request.getParameter("emp");
System.out.println("this is employee value"+employee);

[rajujrk]

Hi,

Please follow the rules, provide your code in CODE tag.

And Please ask questions clearly, from which JSP u r callind this javascript method and how do u want to navigate to print_emp.jsp?

Try to use hidden field

<input type="hidden" name="emp" id="emp">

In Javascript Code:

document.getElementById("emp").value = document.getElementById("Employee").value;

redirect/navigate to JSP