I need basic help

[hobnob487]

Hey guys

I have a basic js code for some alerts and need to make an alert for showing age calculated from dob.

I have 1 already set up to show dob and now need to show the other 1 for age .

Heres my code:

var dob = document.getElementById("dob");
dob.oninput = function(){
alert("your date of birth is: " + dob.value)
daysOld(dob);
};

function daysOld(dob){
var msPerDay = 1000 * 60 * 60 * 24,
now = new Date(),
diff = now - dob;
alert("age is " + diff)
return diff/msPerDay;
};


Any help would be much appreciated

[jalarie]

Maybe this will help:

function daysOld(dob){
msPerDay=1000*24*60*50;
var Birth=new Date(dob)*1;  // birth date in milliseconds since 1-1-1970
now = new Date()*1;
diff = now - Birth;
alert("age is " + diff + "milliseconds")
return diff/msPerDay;
};
Age=daysOld('March 11, 1949');
alert(Age);

[hobnob487]

thanks for your help but this still didn't work. age is being displayed at undefined

[jalarie]

Please post what you have so far.

[hobnob487]

window.onload = function(){
var para = document.getElementById("heading");
para.innerText = "A short exercise on creating dynamic web content.";

var button = document.getElementById("button"); // get the button element
button.onclick = function(){ // Attach a function to it
alert("I've been clicked");
};
var list = document.getElementById("list");
list.onchange = function(){
var item = list.options[list.selectedIndex].text; // This code extracts the text
changeColour(item); // from the selected item in
};
// list (at the .onchange event)
var dob = document.getElementById("dob");
dob.oninput = function(){
alert("your date of birth is: " + dob.value);
daysOld(dob);
};


var range = document.getElementById("range");
var value = document.getElementById("value");
range.onchange = function () {
value.innerText = range.value;
};



function daysOld(age){
var msPerDay = 1000 * 60 * 60 * 24,
now = new Date(),
diff = now - dob;
alert("You are:" + diff);
return diff/msPerDay;
}

function changeColour(colour){
var c = 0;
switch(colour){
case "Red":
c = "#f00";
break;
case "Green":
c = "#0f0";
break;
case "Blue":
c = "#00f";
break;
}
document.bgColor = c;


}
};