that is a javascript code.
As for me, I embedded it to my php file like this:
if(!checkEverything()){ // a function that contains checking of fields.
SCRIPT HERE* //redirects Back to the previous page with values still in the form
}else{
displayAll(); // a function that displays all
}
Note: I cannot add the script as it is because blogspot reads the script and the effect is redirecting you to your previous page. As an alternative I put it as image :)
Hope this helps. It worked 100% for me :)
