HTML and CSS Reference
In-Depth Information
EXAMPLE
18.18 (
CONTINUED
)
3. After the
eval()
evaluates the string returned from the server, it
is converted into an array and displayed below:
Steps for Using Ajax and a JSON Object
EXAMPLE
18.19
1. The JSON text file, "
person.json
" contains an object literal:
{ "Name": "Joe Shmoe",
"Salary": 100000.50,
"Age": 35,
"Married": true
}
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2. The Ajax program requests the file and evals the response:
// Segment from the Ajax program
function getXMLContents(httpRequest) {
if (httpRequest.readyState == 4) {
if (httpRequest.status == 200) {
var person = eval('('+httpRequest.responseText +')') ;
var name=person.Name;
var salary=person.Salary;
var age=person.Age;
var married=person.Married;
alert("Name: "+name +
"\nSalary: " + salary +
"\nAge: " + age +
"\nMarried: "+ married
);
}
else {
alert('There was a problem with the request.');
}
}
}
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