value swap

// Value swap (usually for search fields)
// whenever you have a search field and you want it to defaultly display a value “search…”
// and have that value empty out on focus, well this is how to do this with jQuery 1.4.

swap_val = [];  
$(".swap").each(function(i){  
    swap_val[i] = $(this).val();  
    $(this).focusin(function(){  
        if ($(this).val() == swap_val[i]) {  
            $(this).val("");  
        }  
    }).focusout(function(){  
        if ($.trim($(this).val()) == "") {  
            $(this).val(swap_val[i]);  
        }  
    });  
});