function swapBtn(id) {
	var elt = document.getElementById(id);
	elt.style.visibility='visible';
}
function clearField(fieldId) {
	var input = document.getElementById(fieldId);
	if (input.value=='type your question here.') {
		input.value='';
	}
}
function fillField(fieldId) {
	var input = document.getElementById(fieldId);
	if (input.value=='') {
		input.value='type your question here.';
	}
}

function isNumericKey(obj, e) {

	var code;
	code = (e.keyCode) ? e.keyCode : e.which;
	// allow arrow keys, numbers and delete.
	
	str = stripCommas(obj.value);
	
	if(code == 13 || (code >= 37 && code <= 40) || (code >= 48 && code <= 57) || code == 8 || code == 9 || code == 46) {
		
		if(code >= 48 && code <= 57) {
			if(str.length+1 > 8) {
				obj.value = obj.value.toString().substr(0, 8);
				e.returnValue = false;
				return e.returnValue;
			}
		}
		else {
			return true;
		}
	}
	else {
		e.returnValue = false;
		return e.returnValue;
	}
}

function stripCommas(str) {
	return str.toString().replace(/\,/g, '');
}

function formatPounds(obj) {
	
	str = stripCommas(obj.value);					
	bit = str;
	for(var i = 0; i < Math.floor((bit.length-(1+i))/3); i++) {
		bit = bit.substring(0,bit.length-(4*i+3))+','+
		bit.substring(bit.length-(4*i+3));
	}
	
	obj.value = bit;
}

function toggleDisplayIf(obj, idl, logic, isTable) {

	parts = idl.toString().split(/\|/);
	if(BrowserDetect.browser == 'Explorer') {
		toDisply = 'block';
	}
	else {
		toDisply = (isTable) ? 'table-row' : 'block';
	}
	
	for(i = 0; i < parts.length; i++) {
		var toToggle = document.getElementById(parts[i]);
		toToggle.style.display = (obj.value.toString() == logic.toString()) ? toDisply : 'none';
	}
}

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();