asked on

passing and using a variable from one js function to another

I have this code:

The changeFunc grabs a variable and assigns it to tmpScr

The it calls the function loadXMLDoc()

In the line that reads:

xmlhttp.open("GET","update.asp?arma=" . tmpScr. ",true);

I want tmScr to be like:
xmlhttp.open("GET","update.asp?arma=tmpScr",true); (Whatever value it has into line 24)

I have 2 questions:

1. How do I pass the variable (tmpScr)

2. How do I insert it in the I need

function changeFunc() {
    var select1 = document.getElementById("armadora");
var tmpStr = "";
for (var i = 0; i < select1.length; i++) {
        if (select1.options[i].selected)
            tmpStr = select1.options[i].value;
            
    }
    //alert(tmpStr);
    loadXMLDoc();
   }
	
function loadXMLDoc()
{
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.open("GET","update.asp?arma=" . tmpScr. ",true);
xmlhttp.send();
//document.getElementById("myDiv").innerHTML=xmlhttp.responseText;
}

Open in new window

Gary

Declare the variable outside any function then it becomes a global variable that you can use in any function

var myVar;
function someFunction1(){}
function someFunction2(){}

Open in new window

Shaun Kline

You can use the plus symbol to concatenate strings and variables together:
xmlhttp.open("GET","update.asp?arma=" + tmpScr, true);

robrodp

ASKER

Now how do I concatenate that into my line 24

Gary

See the comment above by Shaun, which I undeleted.

Remove this var tmpStr = ""; from inside the function once you have added this before the function
var tmpStr;

robrodp

ASKER

I dont't get your last comment . I have no var tmpStr = "";

Gary

function changeFunc() {
var select1 = document.getElementById("armadora");
var tmpStr = "";

Just put before that function

var tmpStr;

robrodp

ASKER

I saw it... removed

robrodp

ASKER

For some reasonit is not passing the variable.

If I hard code it it does its job.
xmlhttp.open("GET","update.asp?arma=something", true);

if tmpScr=something
If I leave it concatenated to doesn´t (xmlhttp.open("GET","update.asp?arma=" + tmpScr, true);

Gary

Post your code as you have it.

robrodp

ASKER

Sorry I had a Typo

Getting there

Thx Gary

ASKER CERTIFIED SOLUTION

Gary

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robrodp

ASKER

Thx Gary...

That sounds excellent

Roberto