If you’re working with forms in PHP, and especially if you’re working with forms that have multiple steps, you’ve probably run across the “back button” problem in IE6. Here’s what it looks like:
1) you fill out a form and click the “submit” button – this takes you to another page.
2) you click the “back” [...]
Blessings on the forgotten, and the wonderful, and the strange.
Maybe everyone knows this, but I’ve seen very little about it online. The vast majority of AJAX-oriented functions looks something like this:
var xmlHttp
function showHint(str)
{
if (str.length==0)
{
document.getElementById(“txtHint”).innerHTML=”"
return
}
xmlHttp=GetXmlHttpObject()
if (xmlHttp==null)
{
alert (“Browser does not support HTTP Request”)
return
}
var url=”gethint.php”
url=url+”?q=”+str
url=url+”&sid=”+Math.random()
xmlHttp.onreadystatechange=stateChanged
xmlHttp.open(“GET”,url,true)
xmlHttp.send(null)
}
This function (taken from a w3schools tutorial) calls a function named stateChanged() when it receives data. stateChanged handles the display of response data, and looks like this:
function stateChanged()
{
if (xmlHttp.readyState==4 || xmlHttp.readyState==”complete”)
{
document.getElementById(“txtHint”).innerHTML=xmlHttp.responseText
}
}
Note that this function accepts no [...]