edit css style of an element with a space in its class name

Question

I\'m creating a tumblr them and I have to write an external CSS file but I am having trouble editing the css style of the post elements.

This its structure:

<         


        

Answer 1

This might work:

$('li').each(function() {     
    if($(this).attr('class').indexOf(" ")>-1) {
       $(this).css('border','1px solid #ff0000')
    }  
}