Javascript in php

[jon4433]

I have some if statements in my php code, and I would like to have javascript so that I can have pop up boxes with the error on. I have been trying to work it out, but i'm getting 2 errors.

 

It's my first time using javascript today, so I have no idea if it is correct or not.

 

My javascript and php if statement is giving me one error.

<script type="text/javascript">
if(empty($username))
{
	function show_alert()
	{
	alert("Please fill in the username field!");
	}
}
        </script>

 

And i'm also getting another error with the 'style type'.

<style type="text/css">
body {
font-family: Minecraft;
background-image: url(images/background.png);
background-size:100% 100%;
background-attachment: fixed;
background-repeat: repeat-x;
background-position: left top;
background-color: #999999; 
}
body,td,th {
color: #FFF;
}
</style>

[trq]

PHP and JavaScript are not interchangeable. Your code makes litte sense.

[jon4433]

I learned the script from this website http://www.w3schools.com/js/js_popup.asp. I was trying to get it so, when a user leaves a blank box in my form, a popup window pops up and says a message to them.

[trq]

That still doesn't change the fact that JavaScript and PHP are tow different languages that run in two completely different contexts. JavaScript executes client side within a browser, PHP executes server side within the server. Your code makes no sense because it attempts to mix the two together.

 

 

[jon4433]

I decided to do something else. Thank you anyway!