Window Location with Set Time out - php

Question

I Have to delay my redirection by few seconds. When I try to do this It is not working. I have attached my Javascript and php below. can anyone please help me to solve the problem.window location not working.
<script type="text/javascript">
// constants to define the title of the alert and button text.
var ALERT_TITLE = "Answer";
var ALERT_BUTTON_TEXT = "Ok";
// over-ride the alert method only if this a newer browser.
// Older browser will see standard alerts
if(document.getElementById) {
window.alert = function(txt) {
createCustomAlert(txt);
}
}
function createCustomAlert(txt) {
// shortcut reference to the document object
d = document;
// if the modalContainer object already exists in the DOM, bail out.
if(d.getElementById("modalContainer")) return;
// create the modalContainer div as a child of the BODY element
mObj = d.getElementsByTagName("body")[0].appendChild(d.createElement("div"));
mObj.id = "modalContainer";
// make sure its as tall as it needs to be to overlay all the content on the page
mObj.style.height = document.documentElement.scrollHeight + "px";
// create the DIV that will be the alert
alertObj = mObj.appendChild(d.createElement("div"));
alertObj.id = "alertBox";
// MSIE doesnt treat position:fixed correctly, so this compensates for positioning the alert
if(d.all && !window.opera) alertObj.style.top = document.documentElement.scrollTop + "px";
// center the alert box
alertObj.style.left = (d.documentElement.scrollWidth - alertObj.offsetWidth)/2 + "px";
// create an H1 element as the title bar
h1 = alertObj.appendChild(d.createElement("h1"));
h1.appendChild(d.createTextNode(ALERT_TITLE));
// create a paragraph element to contain the txt argument
msg = alertObj.appendChild(d.createElement("p"));
msg.innerHTML = txt;
// create an anchor element to use as the confirmation button.
btn = alertObj.appendChild(d.createElement("a"));
btn.id = "closeBtn";
btn.appendChild(d.createTextNode(ALERT_BUTTON_TEXT));
btn.href = "#";
// set up the onclick event to remove the alert when the anchor is clicked
btn.onclick = function() { removeCustomAlert();return false; }
}
// removes the custom alert from the DOM
function removeCustomAlert() {
document.getElementsByTagName("body")[0].removeChild(document.getElementById("modalContainer"));
}
function handler(var1,quizId,isCorrect,score) {
alert(var1);
//var id = parseInt(quizId);
quizId++;
var points=10;
if(isCorrect=='true'){
score=score+points;
var string_url="quiz.php?qusId="+quizId+"&score="+score;
setTimeout('window.location =string_url',5000) ;
}
else{
var string_url="quiz.php?qusId="+quizId+"&score="+score;
setTimeout('window.location =string_url',5000) ;
}
}
</script>
while($row1=mysql_fetch_array($result1)){
?><input type="radio" name="answers" value="<?php echo $row1['answers'];?>" onclick="handler('<?php echo $row1["feedback"]; ?>',<?php echo $qusId;?>,'<?php echo $row1["isCorrect"]; ?>',<?php echo $score;?>)
"/ ><?php echo $row1['answers']; ?><br/>
<?php
} ?>

Answer 1

The first parameter of setTimeout should be a function. Try wrapping it with an anonymous function like so:
setTimeout(function() {
window.location = string_url
}, 5000);

Answer 2

try this:
`setTimeout("createCustomAlert(txt);", 3000);`