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();
if (BrowserDetect.browser == "Explorer") {
	window.attachEvent('onload', initWaterMark);
}
else {
	window.addEventListener("load", initWaterMark, false);
}


//zet voor elke input text met het watermark attribuut de voorbeeld text in de input en zet de onfocus/onblur events   
function initWaterMark() {

	var aCollection = document.getElementsByTagName("input");
	var attrWaterMarkColor;
	var attrWaterMarkValue;
	var isW3C = false;
	var isIE = false;
	if (((BrowserDetect.browser == "Mozilla") && (BrowserDetect.version >= 1.75)) ||
			((BrowserDetect.browser == "Safari") && (BrowserDetect.version >= 1.2)) ||
			((BrowserDetect.browser == "Opera") && (BrowserDetect.version >= 8)) ||
			((BrowserDetect.browser == "Netscape") && (BrowserDetect.version >= 6)) ||
			((BrowserDetect.browser == "Chrome") && (BrowserDetect.version >= 4)) ||
			(BrowserDetect.browser == "Firefox")) {
		isW3C = true;
	}

	if ((BrowserDetect.browser == "Explorer") && (BrowserDetect.version >= 5) && (BrowserDetect.OS != "Mac")) {
		isIE = true;
	}
	for (var myEnum = 0; myEnum < aCollection.length; myEnum++) {
		attrWaterMarkValue = aCollection[myEnum].getAttribute('watermarkText');
		attrWatermarkColor = aCollection[myEnum].getAttribute('watermarkColor');

		if (attrWaterMarkValue != null) {
			if (isW3C || isIE) {
				if (aCollection[myEnum].value == '') {
					aCollection[myEnum].value = attrWaterMarkValue;
					aCollection[myEnum].style.color = attrWatermarkColor;
				}
			}
			if (isIE) {
				aCollection[myEnum].attachEvent("onfocus", removeWaterMarkIE(aCollection[myEnum]));
				aCollection[myEnum].attachEvent("onblur", setWaterMarkIE(aCollection[myEnum]));
			}
			else {
				if (isW3C) {
					aCollection[myEnum].addEventListener("focus", removeWaterMark, false);
					aCollection[myEnum].addEventListener("blur", setWaterMark, false);
				}
			}
			if (aCollection[myEnum].value != attrWaterMarkValue) {
				aCollection[myEnum].style.color = '#303030';
			}
		}
	}
}

function removeWaterMark() {
	var watermarkText = this.getAttribute('watermarkText');
	this.style.color = '#303030';
	if (this.value == watermarkText) {
		this.value = "";
	}
}

function removeWaterMarkIE(obj) {
	return function() {
		var watermarkText = obj.getAttribute('watermarkText');
		//remove watermarktext
		if (obj.value == watermarkText) {
			obj.value = "";
			obj.style.color = '#303030';
		}
	}
}

function setWaterMark() {
	//set watermarktext
	var watermarkText = this.getAttribute('watermarkText');
	var watermarkColor = this.getAttribute('watermarkColor');
	if (this.value == "") {
		this.value = watermarkText;
		if (watermarkColor != null) {
			this.style.color = watermarkColor;
		}
		else {
			this.style.color = '#6a6a6a';
		}
	}
	if (this.value != this.getAttribute('watermarkText')) {
		this.style.color = '#303030';
	}
}

function setWaterMarkIE(obj) {
	return function() {
		//set watermarktext
		var watermarkColor = obj.getAttribute('watermarkColor');
		var watermarkText = obj.getAttribute('watermarkText');
		if (obj.value == "") {
			obj.value = watermarkText;
			if (watermarkColor != null) {
				obj.style.color = watermarkColor;
			}
			else {
				obj.style.color = '#6a6a6a';
			}
		}
	}
}


//verwijder alle watermerk voorbeeldteksten voordat er gesubmit wordt. aanroepen in onclientclick event
function removeWatermarksBeforeSubmit() {
	var aCollection = document.getElementsByTagName("input");
	var attrWaterMarkText;
	for (var myEnum = 0; myEnum < aCollection.length; myEnum++) {
		attrWaterMarkText = aCollection[myEnum].getAttribute("watermarkText");
		if (attrWaterMarkText != null) {
			if (aCollection[myEnum].value == attrWaterMarkText) {
				aCollection[myEnum].value = "";
			}
		}
	}
}