$(document).ready(function() { 
	$("#search_value").keyup(function(event) { 
		if(event.keyCode == 13) {
			search();
		}
	});
});

function search() {
	$("#error_message").fadeOut("slow");
	var search_for = $("#search_value").val();
	if(search_for == "") {
		$("#error_message").fadeIn("fast");
	} else {
		var encoded_value = URLEncode(search_for);
		window.location = "search.php?s=" + encoded_value;
	}
}

function URLEncode (clearString) {
  var output = '';
  var x = 0;
  clearString = clearString.toString();
  var regex = /(^[a-zA-Z0-9_.]*)/;
  while (x < clearString.length) {
    var match = regex.exec(clearString.substr(x));
    if (match != null && match.length > 1 && match[1] != '') {
    	output += match[1];
      x += match[1].length;
    } else {
      if (clearString[x] == ' ')
        output += '+';
      else {
        var charCode = clearString.charCodeAt(x);
        var hexVal = charCode.toString(16);
        output += '%' + ( hexVal.length < 2 ? '0' : '' ) + hexVal.toUpperCase();
      }
      x++;
    }
  }
  return output;
}