Submit, onsubmit, submitonsubmit_PHP tutorial

Submit, onsubmit, and submitonsubmit. Submit and onsubmit, submitonsubmit order of occurrence: onsubmit-submit1. blocked form ticket of lading: scriptfunctionsubmitFun () {logical judgment returntrue; allow form submission limit submit and onsubmit (transfer), submitonsubmit

Order of occurrence: onsubmit-> submit

1. Block form ticket submission:

Script
Function submitFun (){
// Logical judgment
Return true; // allow form submission
// Logical judgment
Return false; // form submission not allowed
}
Script

2. onsubmit () and submit ():

Script
Function fun ()
{
Alert ("form_submit ");
}
Script

Submitonsubmit: onsubmit-submit 1. block form ticket submission: script function submitFun () {// Logical return true; // allow form submission // allow...