IE (6,7) breaks all javascript if see this code:

$(".something").each( function() {
var x= $(this).attr('ImgHeight') - 100;
$(this).height(x);
});

But this works:

$(".something").each( function() {
var x= $(this).attr('ImgHeight');
$(this).height(x);
});

And this works:

$(".something").each( function() {
var x= $(this).attr('ImgHeight') -100;
$(this).after(x);
});

html: <span class="something" ImgHeight="280">...</span>

(sorry, i can't change title)