var at = "@";
var dot = ".";
var atrep = "^";
var dotrep = "$";


function hg_em_encrypt(frm, text){

  var len = text.length;
  var tmp = "";

  for(var i=len-1; i>=0; i--){
    tmp +=text.charAt(i);
    var rand = Math.random();
    var j = Math.floor(rand*10);
    tmp += j;
  }
  while (tmp.indexOf(at)>-1) {
    var idx = tmp.indexOf(at);
    tmp = "" + (tmp.substring(0, idx) + atrep + tmp.substring((idx + at.length), tmp.length));
  }
  while (tmp.indexOf(dot)>-1) {
    var idx = tmp.indexOf(dot);
    tmp = "" + (tmp.substring(0, idx) + dotrep + tmp.substring((idx + dot.length), tmp.length));
  }

  //tmp = "<script>document.write('"+tmp+"');</script>";
  
  try{
    frm.emailstr.value = "";
    frm.genstr.value = tmp;
    frm.copystr.value = '<script>document.write(hg_em_decrypt2("'+tmp+'"));</script>';
    
  }catch(e){} 
    
  return tmp;
}


function hg_em_decrypt(frm, text){


  var len = text.length;
  var tmp = "";

  while (text.indexOf(atrep)>-1) {
    var idx = text.indexOf(atrep);
    text = "" + (text.substring(0, idx) + at + text.substring((idx + atrep.length), text.length));
  }

  while (text.indexOf(dotrep)>-1) {
    var idx = text.indexOf(dotrep);
    text = "" + (text.substring(0, idx) + dot + text.substring((idx + dotrep.length), text.length));
  }

  for(var i=len-1; i>=0; i--){
    if(i%2 == 0)
      tmp +=text.charAt(i);
  }

  try{
    frm.genstr.value = "";
    frm.copystr.value = "";
    frm.emailstr.value = tmp;
  }catch(e){}
  
  
  return tmp;
  
}


function hg_em_decrypt2(text){


  var len = text.length;
  var tmp = "";

  while (text.indexOf(atrep)>-1) {
    var idx = text.indexOf(atrep);
    text = "" + (text.substring(0, idx) + at + text.substring((idx + atrep.length), text.length));
  }

  while (text.indexOf(dotrep)>-1) {
    var idx = text.indexOf(dotrep);
    text = "" + (text.substring(0, idx) + dot + text.substring((idx + dotrep.length), text.length));
  }

  for(var i=len-1; i>=0; i--){
    if(i%2 == 0)
      tmp +=text.charAt(i);
  }

  
  
  return tmp;
  
}

/* outputs clickable mailto hyperlink

parameters a_content, a_attributes may be null, i.e. legal calls are:
	write_hg_em_decrypted_mailto(encrypted, a_content, a_attributes)
	write_hg_em_decrypted_mailto(encrypted, a_content)
	write_hg_em_decrypted_mailto(encrypted)
*/
function write_hg_em_decrypted_mailto(encrypted, a_content, a_attributes)
{
	document.write('<a href="mailto:' + hg_em_decrypt2(encrypted) + '"');
	/* append attributes to anchor tag, if any */
	if(a_attributes != null)
	{
		document.write(' ' + a_attributes);
	}
	document.write('>');
	/* write anchor content (displayed text) */
	if(a_content != null)
	{
		document.write(a_content);
	}
	else
	{
		/* if label is null, display email address instead */
		document.write(hg_em_decrypt2(encrypted));
	}
	document.write("</a>");
}


function launchRegistration(){
	window.open('/','','width=400,height=480, scrollbars=yes');
}

function checkEmpty(){
	var valid= true;
	var val= document.searchForm.search.value
	if(val == null || val == ''){
		valid= false;
	}
	document.searchForm.search.value= val;
	return(valid);
}

var BrowserDetect = {
	init: function () {
		this.browser = this.searchString(this.dataBrowser) || "An unknown browser";
		this.version = this.searchVersion(navigator.userAgent)
			|| this.searchVersion(navigator.appVersion)
			|| "an unknown version";
		this.OS = this.searchString(this.dataOS) || "an unknown OS";
	},
	searchString: function (data) {
		for (var i=0;i<data.length;i++)	{
			var dataString = data[i].string;
			var dataProp = data[i].prop;
			this.versionSearchString = data[i].versionSearch || data[i].identity;
			if (dataString) {
				if (dataString.indexOf(data[i].subString) != -1)
					return data[i].identity;
			}
			else if (dataProp)
				return data[i].identity;
		}
	},
	searchVersion: function (dataString) {
		var index = dataString.indexOf(this.versionSearchString);
		if (index == -1) return;
		return parseFloat(dataString.substring(index+this.versionSearchString.length+1));
	},
	dataBrowser: [
		{
			string: navigator.userAgent,
			subString: "Chrome",
			identity: "Chrome"
		},
		{ 	string: navigator.userAgent,
			subString: "OmniWeb",
			versionSearch: "OmniWeb/",
			identity: "OmniWeb"
		},
		{
			string: navigator.vendor,
			subString: "Apple",
			identity: "Safari"
		},
		{
			prop: window.opera,
			identity: "Opera"
		},
		{
			string: navigator.vendor,
			subString: "iCab",
			identity: "iCab"
		},
		{
			string: navigator.vendor,
			subString: "KDE",
			identity: "Konqueror"
		},
		{
			string: navigator.userAgent,
			subString: "Firefox",
			identity: "Firefox"
		},
		{
			string: navigator.vendor,
			subString: "Camino",
			identity: "Camino"
		},
		{		// for newer Netscapes (6+)
			string: navigator.userAgent,
			subString: "Netscape",
			identity: "Netscape"
		},
		{
			string: navigator.userAgent,
			subString: "MSIE",
			identity: "Explorer",
			versionSearch: "MSIE"
		},
		{
			string: navigator.userAgent,
			subString: "Gecko",
			identity: "Mozilla",
			versionSearch: "rv"
		},
		{ 		// for older Netscapes (4-)
			string: navigator.userAgent,
			subString: "Mozilla",
			identity: "Netscape",
			versionSearch: "Mozilla"
		}
	],
	dataOS : [
		{
			string: navigator.platform,
			subString: "Win",
			identity: "Windows"
		},
		{
			string: navigator.platform,
			subString: "Mac",
			identity: "Mac"
		},
		{
			string: navigator.platform,
			subString: "Linux",
			identity: "Linux"
		}
	]

};