[JS | MVC2] Search Function

<input type="text"onKeyDown="window.alert('down to the hood, you know!')" />

<input type="text"onKeyDown="window.alert('down to the hood, you know!')" />

$('#filter').keyup(function(event) {
    	//if esc is pressed or nothing is entered	    	
        if ( event.keyCode == 27 || $(this).val() == '' ) {
        	//if esc is pressed we want to clear the value of search box
        	$(this).val('');
        		
        	//we want each row to be visible because if nothing
        	//is entered then all rows are matched.
            $('#productenWrapper fieldset').removeClass('visible').show().addClass('visible');
        } else {
           //Filter        
    	   filter('#wrapper p', $(this).val());
    	}
    });
});

function filter(selector, query) {
    query	=	$.trim(query); //trim white space
    query = query.replace(/ /gi, '|'); //add OR for regex
  
      $(selector).each(function() {
        if($(this).text().search(new RegExp(query, "i")) < 0) { 
        	$(this).parent().hide(); 
        } else {
        	$(this).parent().show(); 
        }
      });
};

$('#filter').keyup(function(event) {
    	//if esc is pressed or nothing is entered	    	
        if ( event.keyCode == 27 || $(this).val() == '' ) {
        	//if esc is pressed we want to clear the value of search box
        	$(this).val('');
 
        	//we want each row to be visible because if nothing
        	//is entered then all rows are matched.
            $('#productenWrapper fieldset').removeClass('visible').show().addClass('visible');
        } else {
           //Filter        
    	   filter('#wrapper p', $(this).val());
    	}
    });
});
 
function filter(selector, query) {
    query	=	$.trim(query); //trim white space
    query = query.replace(/ /gi, '|'); //add OR for regex
 
      $(selector).each(function() {
        if($(this).text().search(new RegExp(query, "i")) < 0) { 
        	$(this).parent().hide(); 
        } else {
        	$(this).parent().show(); 
        }
      });
};