Hope this helps, pretty much copied straight from the docs
enquire.register("screen and (min-width : 769px ) and (max-width : 959px)", {
match : function() {
$(".slidingDiv_how").show();
},
unmatch : function() {
$(".slidingDiv_how").hide();
}
}).listen();
Note change for latest version
v2.0.0 (2013-04-17)
listen and fire are no longer needed as of v2, and have been dropped from the API. Removing any usage of them in your code is all that is required. Also, as enquire no longer relies on resize events you must make sure your polyfill supports matchMedia.addListener. Details of this can be found in the legacy browser section.