if($(’element:visible’).length < 1){
alert(’Element is In Visible’);
}
else{
alert(’Element is Visible’);
}
Learn , Share , Enjoy
Determine element is visible or not
Retriving multiple values from a single field of your database
if your having a field in your table which holds multiple values and you want to display the same.then use “spliti”
example:
company_dept is the field name.
$sql=”SELECT *from table_name”;
$ex=mysql_query($sql)
$result=mysql_fetch_array($ex);
$cmp_dept=$result['company_dept'];//when you echo this will display all the values
suppose you want single value then
$dept=spliti(”,”, $cmp_dept, 5);//this will split a string into array
$cnt=count($dept);//this will count the number of elements in the array
for output:print_r($dept)
or echo $dept[0];
spliti is case insensitive whereas split is not.
for more info visit:http://www.php.net/manual/en/function.spliti.php
Inserting multiple values from a listbox into the database
if you have a listbox called “department” and want to insert multiple values from the listbox into the database,then:
when the user submits the form,store the value in a variable
$company_dept=$_POST['department'];
query:INSERT into table_name values(’”.join(”,”,$company_dept).”‘)
validate email in javascript
var str = $(”#email”).val();
if((str.indexOf(”.”) > 2) && (str.indexOf(”@”) > 0) && ((str.indexOf(”.”) + 1) < str.length-1)){
alert(”valid”);
}
else{
alert(”Invalid”);
}
Eclipse shortcut
To comment out a line of html code in eclipse IDE , use the following shortcut
ctrl + /
Email check in php
function isValidEmail($email){ return eregi("^[_a-z0-9-]+(\.[_a-z0-9-]+)*@[a-z0-9-] +(\.[a-z0-9-]+)*(\.[a-z]{2,3})$", $email); }
Make your css dynamic
To implement constants in css , let your php script output as css by passing the following headers :
header(’content-type:text/css’);
header(”Expires: “.gmdate(”D, d M Y H:i:s”, (time()+900)) . ” GMT”);
Using Column alias in where clause
select (basicsal + hra) as salary from employee where salary > 5000
It will give error (Unkown column salary in where clause.
Instead you can use :
select (basicsal + hra) as salary from employee having salary > 5000
Wordpress – different single.php for different categories
if you have a category called photos and another category called videos , you need to format the single.php differently for each category . this is easy and you can just write the following code in single.php :
if ( in_category(’2′) ) {
include(TEMPLATEPATH . ‘/single-kodetricks.php’);
}
else
include(TEMPLATEPATH . ‘/single-blog.php’);
To display 2 decimal after , Javascript
to display 2 decimal after any number use toFixed() function of javascript
eg. var num = 25;
alert(num.toFixed(2));
it will give 25.00 instead of only 25
Website speed
we can minimise all the js and place it in a single file at the end of the project .
this will reduce the number of http requests and save response time
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