function for each element

Ive got a function:

setInterval ( doSomething, 100 );

function doS开发者_运维技巧omething ( )
{
$("#i_msl").animate({ top: "-150px",}, 1000 ).delay(1000);
$("#i_msl").animate({ top: "-300px",}, 1000 ).delay(1000); 
$("#i_msl").animate({ top: "0px",}, 1000 ).delay(1000); 
}

but it works only for one element. How can I make it work for all elements with #i_msl on page?

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You are assigning an ID to multiple elements. You can't do that. Try giving them a class instead:

class="i_msl"

You can access it with $(".i_msl")

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You can't. You can only have one unique id per page. Change it from id to class, and target by $('.i_msl').

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The selector #i_msl is for a specific ID; these are supposed to be unique on the page. Instead, assign each element a unique class, such as:

class="my-class"

Then just select them using a class selector:

$(".my-class").animate({ top: "-150px",}, 1000 ).delay(1000);
$(".my-class").animate({ top: "-300px",}, 1000 ).delay(1000); 
$(".my-class").animate({ top: "0px",}, 1000 ).delay(1000); 

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#i_msl is an ID selector. You can (should) only have a single item on the page with a particular id. If you need multiple elements to match the selector, use a class: .i_msl

Also, setInterval will be called every 100ms which may cause issues with execution when your animation takes longer than the interval.