// Simple JavaScript Templating
// John Resig - http://ejohn.org/ - MIT Licensed
(function(){
  var cache = {};

  this.tmpl = function tmpl(str, data){
    // Figure out if we're getting a template, or if we need to
    // load the template - and be sure to cache the result.
    var fn = !/\W/.test(str) ?
      cache[str] = cache[str] ||
        tmpl(document.getElementById(str).innerHTML) :

      // Generate a reusable function that will serve as a template
      // generator (and which will be cached).
      new Function("obj",
        "var p=[],print=function(){p.push.apply(p,arguments);};" +

        // Introduce the data as local variables using with(){}
        "with(obj){p.push('" +

        // Convert the template into pure JavaScript
        str
          .replace(/[\r\t\n]/g, " ")
          .split("<%").join("\t")
          .replace(/((^|%>)[^\t]*)'/g, "$1\r")
          .replace(/\t=(.*?)%>/g, "',$1,'")
          .split("\t").join("');")
          .split("%>").join("p.push('")
          .split("\r").join("\\'")
      + "');}return p.join('');");

    // Provide some basic currying to the user
    return data ? fn( data ) : fn;
  };
})();

function sprintf() {
    if (!arguments || arguments.length < 1 || !RegExp) {
        return;
    }
    var str = arguments[0];
    var re = /([^%]*)%('.|0|\x20)?(-)?(\d+)?(\.\d+)?(%|b|c|d|u|f|o|s|x|X)(.*)/;
    var a = b = [], numSubstitutions = 0, numMatches = 0;
    while (a = re.exec(str)) {
        var leftpart = a[1], pPad = a[2], pJustify = a[3], pMinLength = a[4];
        var pPrecision = a[5], pType = a[6], rightPart = a[7];

        numMatches++;
        if (pType == '%') {
            subst = '%';
        } else {
            numSubstitutions++;
            if (numSubstitutions >= arguments.length) {
                alert('Error! Not enough function arguments (' + (arguments.length - 1) + ', excluding the string)\nfor the number of substitution parameters in string (' + numSubstitutions + ' so far).');
            }
            var param = arguments[numSubstitutions];
            var pad = '';
                   if (pPad && pPad.substr(0,1) == "'") pad = leftpart.substr(1,1);
              else if (pPad) pad = pPad;
            var justifyRight = true;
                   if (pJustify && pJustify === "-") justifyRight = false;
            var minLength = -1;
                   if (pMinLength) minLength = parseInt(pMinLength);
            var precision = -1;
                   if (pPrecision && pType == 'f') precision = parseInt(pPrecision.substring(1));
            var subst = param;
                   if (pType == 'b') subst = parseInt(param).toString(2);
              else if (pType == 'c') subst = String.fromCharCode(parseInt(param));
              else if (pType == 'd') subst = parseInt(param) ? parseInt(param) : 0;
              else if (pType == 'u') subst = Math.abs(param);
              else if (pType == 'f') subst = (precision > -1) ? Math.round(parseFloat(param) * Math.pow(10, precision)) / Math.pow(10, precision): parseFloat(param);
              else if (pType == 'o') subst = parseInt(param).toString(8);
              else if (pType == 's') subst = param;
              else if (pType == 'x') subst = ('' + parseInt(param).toString(16)).toLowerCase();
              else if (pType == 'X') subst = ('' + parseInt(param).toString(16)).toUpperCase();
        }
        str = leftpart + subst + rightPart;
    }
    return str;
}