I have this code that automatically displays a table with mysql data depending on the selection from a form.
I need to add code to make this refresh every 30 seconds. I ave googled this and after trying every single way I know to implement the setTimeout() function, I have almost given up.
Can anyone please help me here....
This is my code:
The form is:
<form>
Select:
<select name="eqno" onchange="showPress(this.value)">
<option value="1" >Number 1</option>
<option value="2" >Number 2</option>
<option value="3" >Number 3</option>
</select>
</form>
var xmlHttp
function showPress(str)
{
xmlHttp=GetXmlHttpObject()
if (xmlHttp==null)
{
alert ("Browser does not support HTTP Request")
return
}
var url="_data.php"
url=url+"?q="+str
url=url+"&sid="+Math.random()
xmlHttp.onreadystatechange=stateChanged
xmlHttp.open("GET",url,true)
xmlHttp.send(null)
}
function stateChanged()
{
if (xmlHttp.readyState==4 || xmlHttp.readyState=="complete")
{
document.getElementById("txtHint").innerHTML=xmlHttp.responseText
}
}
function GetXmlHttpObject()
{
var xmlHttp=null;
try
{
// Firefox, Opera 8.0+, Safari
xmlHttp=new XMLHttpRequest();
}
catch (e)
{
//Internet Explorer
try
{
xmlHttp=new ActiveXObject("Msxml2.XMLHTTP");
}
catch (e)
{
xmlHttp=new ActiveXObject("Microsoft.XMLHTTP");
}
}
return xmlHttp;
}