// #############################################################################
// GENERAL FUNCTIONS
// #############################################################################

  // Image pre-loader - from Dreamweaver hence it's ugly as hell
  function MM_preloadImages() { //v3.0
  var d=document; if(d.images){ if(!d.MM_p) d.MM_p=new Array();
  var i,j=d.MM_p.length,a=MM_preloadImages.arguments; for(i=0; i<a.length; i++)
  if (a[i].indexOf("#")!=0){ d.MM_p[j]=new Image; d.MM_p[j++].src=a[i];}}
  }
  function MM_swapImgRestore() { //v3.0
  var i,x,a=document.MM_sr; for(i=0;a&&i<a.length&&(x=a[i])&&x.oSrc;i++) x.src=x.oSrc;
  }
  function MM_findObj(n, d) { //v4.01
  var p,i,x; if(!d) d=document; if((p=n.indexOf("?"))>0&&parent.frames.length) {
  d=parent.frames[n.substring(p+1)].document; n=n.substring(0,p);}
  if(!(x=d[n])&&d.all) x=d.all[n]; for (i=0;!x&&i<d.forms.length;i++) x=d.forms[i][n];
  for(i=0;!x&&d.layers&&i<d.layers.length;i++) x=MM_findObj(n,d.layers[i].document);
  if(!x && d.getElementById) x=d.getElementById(n); return x;
  }
  function MM_swapImage() { //v3.0
  var i,j=0,x,a=MM_swapImage.arguments; document.MM_sr=new Array; for(i=0;i<(a.length-2);i+=3)
  if ((x=MM_findObj(a[i]))!=null){document.MM_sr[j++]=x; if(!x.oSrc) x.oSrc=x.src; x.src=a[i+2];}
  }

//------------------------------------------------------------------------------
// Browser detection

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"
		}
	]

};
BrowserDetect.init();

 

// -----------------------------------------------------------------------------      
  // Preload functions for specific pages as specified by 'pagename'
  function preLoad(pagename) {
  
    MM_preloadImages( 'images/bg_main.jpg',
                      'images/menu_highlight.jpg'
    )
  
    if (pagename == 'index') {
    MM_preloadImages( 'images/button_buynow.jpg',
                      'images/button_buynow_mo.jpg');
    if (BrowserDetect.browser == "Firefox" || BrowserDetect.browser == "Opera" || BrowserDetect.browser == "Safari") {
        if (screen.height < 1024) {
            document.getElementById('extrapush').innerHTML = "<br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br />"
        }
    
    }

    } 
    
  
  }

// -----------------------------------------------------------------------------   
  // Function to hide/unhide a given DIV
  function toggleLayer( whichLayer )
  {
  var elem, vis;
  if( document.getElementById ) // this is the way the standards work
    elem = document.getElementById( whichLayer );
  else if( document.all ) // this is the way old msie versions work
      elem = document.all[whichLayer];
  else if( document.layers ) // this is the way nn4 works
    elem = document.layers[whichLayer];
  vis = elem.style;
  // if the style.display value is blank we try to figure it out here
  if(vis.display==''&&elem.offsetWidth!=undefined&&elem.offsetHeight!=undefined)
    vis.display = (elem.offsetWidth!=0&&elem.offsetHeight!=0)?'block':'none';
  vis.display = (vis.display==''||vis.display=='block')?'none':'block';
  }  

// -----------------------------------------------------------------------------    
  // Function to set the opacity of an object in different browsers
  function setOpacity(obj, opacity) {
  opacity = (opacity == 100)?99.999:opacity;
  
  // IE/Win
  obj.style.filter = "alpha(opacity:"+opacity+")";
  
  // Safari<1.2, Konqueror
  obj.style.KHTMLOpacity = opacity/100;
  
  // Older Mozilla and Firefox
  obj.style.MozOpacity = opacity/100;
  
  // Safari 1.2, newer Firefox and Mozilla, CSS3
  obj.style.opacity = opacity/100;
  }

// -----------------------------------------------------------------------------    
  // Function to fade in a given Div
  function fadeIn(objId,opacity) {
  if (document.getElementById) {
    obj = document.getElementById(objId);
    if (opacity <= 100) {
      setOpacity(obj, opacity);
      opacity += 10;
      window.setTimeout("fadeIn('"+objId+"',"+opacity+")", 100);
    }
  }
  }

// -----------------------------------------------------------------------------    
  // ... and to fade one out
  function fadeOut(objId,opacity) {
  if (document.getElementById) {
    obj = document.getElementById(objId);
    if (opacity >= 0) {
      setOpacity(obj, opacity);
      opacity -= 10;
      window.setTimeout("fadeOut('"+objId+"',"+opacity+")", 100);
    }
  }
  }
  
// -----------------------------------------------------------------------------   
  // This function allows me to take parameters from the URL
  // Example URL: http://www.foo.com/index.html?bob=123&frank=321&tom=213#top
  // Usage: to get the value of "frank" you use:
  // var frank_param = gup( 'frank' );

  function gup( name )
  {  
    name = name.replace(/[\[]/,"\\\[").replace(/[\]]/,"\\\]");  
    var regexS = "[\\?&]"+name+"=([^&#]*)";  
    var regex = new RegExp( regexS );  
    var results = regex.exec( window.location.href );  
    
    if( results == null )    
      return "";  
    else    
      return results[1];    
  }
  
// #############################################################################
// CONTACT FORM 
// #############################################################################

// -----------------------------------------------------------------------------   
  // Function to check if the e-mail address is valid
  function CheckContactEmail() {
    email = document.ContactForm.EmailAddress.value
    AtPos = email.indexOf("@")
    StopPos = email.lastIndexOf(".")
      
    if (email == "") {
    return false;
    }
    
    if (AtPos == -1 || StopPos == -1) {
    return false;
    }
    
    if (StopPos < AtPos) {
    return false;
    }
    
    if (StopPos - AtPos == 1) {
    return false;
    } 
    
    return true;
  }

// ----------------------------------------------------------------------------- 
  // Function to validate the contact form
  function validateContactForm()
  {
    
    document.getElementById('SubmitTag').innerHTML='<span class=small_text>Submitting...</span>';
    if (document.ContactForm.YourName.value == '')
  	{
  		// No name given
  		alert('ERROR: Please enter your name.');
      RestoreButtonsCForm();
      return false;
  	}
  	else if (CheckContactEmail() == false) {
      alert('ERROR: Please enter a valid e-mail address');
      RestoreButtonsCForm();
      return false;
    }
    else if ((document.ContactForm.Comments.value == '') || (document.ContactForm.Comments.value == 'Please provide some detail to help us respond to your enquiry.'))
  	{
      alert('ERROR: Please enter something into the comments box');
      RestoreButtonsCForm();
      return false;
    }
    
  	// If the script gets this far through all of your fields
  	// without problems, it's ok and you can submit the form
  
  	return true;
  }