$(document).ready(function(){
    var initialSearch = $('form.search input.text').attr("value");
    var currentSearch = "";
    $('form.search input.text').focusin(function(){
        currentSearch = $('form.search input.text').attr("value");
        if( currentSearch == initialSearch )
        {
            $('form.search input.text').attr("value","");
        }
    });
});