// funzione cross-browser per selezionare elementi nella pagina
	function getObj(objID)
	{
		if (document.getElementById) {return document.getElementById(objID);}
		else if (document.all) {return document.all[objID];}
		else if (document.layers) {return document.layers[objID];}
		else return null;
	}

	function isNumeric(x) {
		// use this function like this: if (isNumeric(myVar)) { }
		// regular expression that validates a value is numeric
		var RegExp = /^(-)?(\d*)(\.?)(\d*)$/; // Note: this WILL allow a number that ends in a decimal: -452.
		// compare the argument to the RegEx
		// the 'match' function returns 0 if the value didn't match
		var result = x.match(RegExp);
		return result;
	}


	// ritorno le dimensioni dell'area utile della finestra (cross-browser)
	function get_window_size()
	{
		var w = window;
		var width = w.innerWidth || (w.document.documentElement.clientWidth || w.document.body.clientWidth);
		var height = w.innerHeight || (w.document.documentElement.clientHeight || w.document.body.clientHeight);
		return [width, height]
	}

	// See http://binnyva.blogspot.com/2005/10/dump-function-javascript-equivalent-of.html
	function var_dump(arr,level) {
		var dumped_text = "";
		if(!level) level = 0;

		//The padding given at the beginning of the line.
		var level_padding = "";
		for(var j=0;j<level+1;j++) level_padding += "    ";
		if (level > 10) return level_padding + "*Maximum Depth Reached*\n"; //Too much recursion preventer

		if(typeof(arr) == 'object') { //Array/Hashes/Objects
			for(var item in arr) {
				var value = arr[item];
				//alert(value);

				if(typeof(value) == 'object') { //If it is an array,
					dumped_text += level_padding + "'" + item + "' ...\n";
					dumped_text += dump(value,level+1);
				} else {
					dumped_text += level_padding + "'" + item + "' => \"" + value + "\"\n";
				}
			}
		} else { //Stings/Chars/Numbers etc.
			dumped_text = "===>"+arr+"<===("+typeof(arr)+")";
		}
		return dumped_text;
	}





// This code was written by Tyler Akins and has been placed in the
// public domain.  It would be nice if you left this header intact.
// Base64 code from Tyler Akins -- http://rumkin.com >>>

var keyStr64 = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=";

function base64_encode(input) {
   var output = "";
   var chr1, chr2, chr3;
   var enc1, enc2, enc3, enc4;
   var i = 0;

   do {
      chr1 = input.charCodeAt(i++);
      chr2 = input.charCodeAt(i++);
      chr3 = input.charCodeAt(i++);

      enc1 = chr1 >> 2;
      enc2 = ((chr1 & 3) << 4) | (chr2 >> 4);
      enc3 = ((chr2 & 15) << 2) | (chr3 >> 6);
      enc4 = chr3 & 63;

      if (isNaN(chr2)) {
         enc3 = enc4 = 64;
      } else if (isNaN(chr3)) {
         enc4 = 64;
      }

      output = output + keyStr64.charAt(enc1) + keyStr64.charAt(enc2) +
         keyStr64.charAt(enc3) + keyStr64.charAt(enc4);
   } while (i < input.length);

   return output;
}

function base64_decode(input) {
   var output = "";
   var chr1, chr2, chr3;
   var enc1, enc2, enc3, enc4;
   var i = 0;

   // remove all characters that are not A-Z, a-z, 0-9, +, /, or =
   input = input.replace(/[^A-Za-z0-9\+\/\=]/g, "");

   do {
      enc1 = keyStr64.indexOf(input.charAt(i++));
      enc2 = keyStr64.indexOf(input.charAt(i++));
      enc3 = keyStr64.indexOf(input.charAt(i++));
      enc4 = keyStr64.indexOf(input.charAt(i++));

      chr1 = (enc1 << 2) | (enc2 >> 4);
      chr2 = ((enc2 & 15) << 4) | (enc3 >> 2);
      chr3 = ((enc3 & 3) << 6) | enc4;

      output = output + String.fromCharCode(chr1);

      if (enc3 != 64) {
         output = output + String.fromCharCode(chr2);
      }
      if (enc4 != 64) {
         output = output + String.fromCharCode(chr3);
      }
   } while (i < input.length);

   return output;
}

// Base64 code from Tyler Akins -- http://rumkin.com <<<





function textCounter(text_field_name, counter_field_name, maxlimit)
{
	var text = document.getElementById(text_field_name);
	var counter = document.getElementById(counter_field_name);
	if (maxlimit > 0)
	{
		if (text.value.length > maxlimit)
			text.value = text.value.substring(0, maxlimit);
		else
			counter.value = maxlimit - text.value.length;
	}
	else
		counter.value = text.value.length;
}


// aggiunge dinamicamente operazioni al window.onload di una pagina
function addLoadEvent(func)
{
	var oldonload = window.onload;
	if (typeof window.onload != 'function')
	{
		window.onload = func;
	}
	else
	{
		window.onload = function()
		{
			if (oldonload) oldonload();
			func();
		}
	}
}