Embed media player in HTML page

Javscript Date comparison with current date

var d=new Date();
var form_date = "01-08-2009";
var split_date = form_date.split("-");
var added_timestamp = Number(d.setMonth(split_date[0]-1,split_date[1]));
var form_date = parseInt(split_date[0])+"/"+parseInt(split_date[1])+"/"+parseInt(split_date[2])+" "+d.getHours()+":"+d.getMinutes()+":"+d.getSeconds();


var timestamp = Number(new Date());
if(form_date < timestamp){
alert(Please select the date greater than the current date!);

}

MYSQL FOREIGN KEY

To create mysql foreign key the table engine must be InnoDB and the version is 5.
Command
------
CREATE TABLE `bookings` ( id INT , customer_id INT , FOREIGN KEY `customer_id` REFERENCES customer(id))ENGINE=INNODB;
ALTER TABLE `bookings` ADD CONSTRAINT FOREIGN KEY `customer_id` REFERENCES customer(id);

Highligt table row using Javascript

if(document.getElementById(id).hasChildNodes()){
var ctds = document.getElementById(id).getElementsByTagName('TD');
for(var chld = 0; chld < ctds.length ;chld++ ){
ctds[chld].className ='selectedFromList';
}
}
if(document.getElementById(id).parentNode){
var ctrs = document.getElementById(id).parentNode.getElementsByTagName('TR');
for(var chld = 0; chld < ctrs.length ;chld++ ){
if(ctrs[chld].id != id){
var ctds = ctrs[chld].getElementsByTagName('TD');
for(var chltr = 0; chltr < ctds.length ;chltr++ )
ctds[chltr].className = 'noteSelectedNorm';
}
}
}

Javascript email validation

function email_validation{
var email_reg = /^([A-Za-z0-9_\-\.])+\@([A-Za-z0-9_\-\.])+\.([A-Za-z]{2,4})$/;
if(email_reg.test(email) == false){
showMessage('Invali email address!');
error = true;
}
}

Get Multiple Values in the select list using Javascript

function getMultipleSelectedValues(filed_name)
{
var selObj = document.getElementById(filed_name);
var selectedArray = new Array();
var countObj = selObj.options.length;
var arr_count = 0;
for(var i = 0 ; i < countObj ; i++)
if (selObj.options[i].selected) {
selectedArray[arr_count] = selObj.options[i].value;
arr_count++;
}
return selectedArray;
}

Create TRIGGER to back-up the old data

CREATE TRIGGER backup_feedback
BEFORE UPDATE ON feedbacks
FOR EACH ROW
BEGIN
IF OLD.feedback <> NEW.feedback THEN
INSERT INTO user_logs(tab_name,field_name,old_value,new_value) VALUES ('feedbacks','feedback',OLD.feedback,NEW.feedback);
END IF;
END;