function $(lyr){
	return document.getElementById(lyr);	
}

function init(){

	deal_with_pngs();
/*
	setTimeout("changeDim('spider',0,-450,3,'px','visible')",2000);
	setTimeout("changeDim('spider',0,-350,3,'px','visible')",6000);
	setTimeout("changeDim('spider',0,-300,3,'px','visible')",8000);
	setTimeout("changeDim('spider',0,-110,3,'px','visible')",10500);
*/
}



var dimensions=new Array('top','left','width','height','marginLeft','marginTop');

function animLS(lyr,dim,target,step,mode,overflow){

	obj=document.getElementById(lyr);

	real=obj.lsReal[dim];
	delta=Math.sqrt(Math.abs(target-real))*0.0125;

	step=obj.sig[dim]*10;

	new_dim=obj.lsReal[dim];
	obj.lsReal[dim]=real+(obj.step[dim]*step*delta);

	var d=dimensions[dim];

	if((new_dim>=target && obj.sig[dim]>0) || (new_dim<=target && obj.sig[dim]<0))
		{
		target=target+''+mode;
		obj.style[d]=target;
		clearInterval(obj.lsInterval[dim]);
		obj.lsInterval[dim]=0;

		if(overflow!='off')
			obj.style.overflow=overflow;
		return;
		}
	else
		{
		new_dim=new_dim+''+mode;
		obj.style[d]=new_dim;
		}
}

function changeDim(lyr,dim,target,step,mode,overflow){

	obj=$(lyr);

	if(obj.lsReal==null)
		{
		w_w=document.body.clientWidth;
		w_h=document.body.clientHeight;

		obj.step=new Array();
		obj.sig=new Array();
		obj.lsReal=new Array();
		obj.lsInterval=new Array();
		}

	if(obj.lsInterval[dim]!=0)
		{
		clearInterval(obj.lsInterval[dim]);
		obj.lsInterval[dim]=0;
		}

	switch(dim)
		{
		case 0:
			obj.lsReal[0]=(!parseInt(obj.offsetTop))?0:parseInt(obj.offsetTop);
			break;
		case 1:
			obj.lsReal[1]=(mode=='%')?((parseInt(obj.offsetLeft)/w_w)*100):parseInt(obj.offsetLeft);
			break;
		case 2:
			obj.lsReal[2]=(mode=='%')?((parseInt(obj.offsetWidth)/w_w)*100):parseInt(obj.offsetWidth);
			break;
		case 3:
			obj.lsReal[3]=(mode=='%')?((parseInt(obj.offsetHeight)/w_h)*100):parseInt(obj.offsetHeight);
			break;
		case 4:
			obj.lsReal[4]=parseInt(obj.style.marginLeft);
			break;
		case 5:
			obj.lsReal[5]=(!parseInt(obj.style.marginTop))?0:parseInt(obj.style.marginTop);
			break;
		}

	obj.step[dim]=step;
	obj.sig[dim]=((target-obj.lsReal[dim])>0)?1:-1;

	obj.lsInterval[dim]=setInterval("animLS('"+lyr+"',"+dim+","+target+","+step+",'"+mode+"','"+overflow+"')",30);
}

function createCookie(name,value,days) {

	if(days)
		{
		var date = new Date();
		date.setTime(date.getTime()+(days*24*60*60*1000));
		var expires = "; expires="+date.toGMTString();
		}
	else
		var expires = "";

	document.cookie = name+"="+value+expires+"; path=/";
}

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: "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();

function nospam(a,b){
	window.location='mailto:'+b+'@'+a+'?subject=general enquiry';
}

function form_submit(frm){
	$(frm).submit();
}

function deal_with_pngs(){

	if(BrowserDetect.browser=='Explorer' && BrowserDetect.version==6)
		{
		var imgs=document.getElementsByTagName('IMG');

		for(var i=0;i<imgs.length;i++)
			{
			var img=imgs[i];

			if(img.src.indexOf('.png')>-1)
				{			
				var cur=img.src;

				img.src='http://www.tropicalconnections.co.uk/grfx/s.gif';
				
				if(img.style.filter=='')
					img.style.filter='progid:DXImageTransform.Microsoft.AlphaImageLoader(src="'+cur+'")';
				}
			}			
		}
}