Eddie On Everything

I recently needed to calculate the number of days that had elapsed since a given date. Not happy with any of the code snippets I found on the internet, I wrote my own. A demo is below, along with the the javascript code. Note that the code uses a bit of dynamic HTML so no page refresh is necessary. The answer will appear beneath the form.

Feel free to use these in your projects.

To get this to work on your website, you’ll need the following javascript function, along with the HTML file below.

The JavaScript:

function daysSince(m,d,y){
   if (d == '' || m=='' || y==''){
      alert ("All fields must be entered");
      return;
   }

   if (isNaN(m) || isNaN(y) || isNaN(d)){
      alert("Only numbers .");
      return;
   }

   var myDate=new Date();
   var yourDate=new Date(y,m-1,d);

   var secondsInADay = 1000*60*60*24;
   var diff = Math.floor( (myDate.getTime() - yourDate.getTime()) / secondsInADay );
   document.getElementById("result").innerHTML= "It has been " +
      diff + " days since " + m + "/" + d + "/" + y +".";
}

The HTML:

Day

Month

Year

If you make any useful alterations, feel free to share them in the comments.