[jQuery] How to check is element "droppable"

[jQuery] How to check is element "droppable"


Hi.
How I can check this? I have next part of code where I must check is
element "tag" = droppable.
Instead code after "// pseudo:" i must add some function that check if
element is droppable. If true it must write some text in that element
(For example: $(tag).text('bla bla') )
////////// code /////////////
function help(){
// array generated by PHP:
            <?=$correct?>
// random num. from upper array:
            var rand = Math.floor( Math.random() * cor.length );
// Set tag
            if(rand != 0){
                var tag = '#p'+rand;
            }
// here goes code that check if "tag" is
droppable...
/// pseudo:
if(tag is droppable){
alert('is dropable');
}
}
//////// CODE /////////////