var isRichText = false;
var rng;
var currentRTE;
var allRTEs = "";

var isIE;
var isGecko;
var isSafari;
var isKonqueror;

var imagesPath;
var includesPath;
var cssFile;


function initRTE(imgPath, incPath, css) {
	var ua = navigator.userAgent.toLowerCase();
	isIE = ((ua.indexOf("msie") != -1) && (ua.indexOf("opera") == -1) && (ua.indexOf("webtv") == -1)); 
	isGecko = (ua.indexOf("gecko") != -1);
	isSafari = (ua.indexOf("safari") != -1);
	isKonqueror = (ua.indexOf("konqueror") != -1);
	
	if (document.getElementById && document.designMode && !isSafari && !isKonqueror) {
		isRichText = true;
	}
	
/*	if (isIE) {
		document.onmouseover = raiseButton;
		document.onmouseout  = normalButton;
		document.onmousedown = lowerButton;
		document.onmouseup   = raiseButton;
	}*/
	
	imagesPath = imgPath;
	includesPath = incPath;
	cssFile = css;
	
	if (isRichText) document.writeln('<style type="text/css">@import "' + includesPath + 'rte.css";</style>');
}

function writeRichText(rte, html, width, height, buttons, readOnly) {
	if (isRichText) {
		if (allRTEs.length > 0) allRTEs += ";";
		allRTEs += rte;
		
		if (readOnly) buttons = false;
		
		if (isIE) {
			if (buttons && (width < 540)) width = 540;
			var tablewidth = width;
		} else {
			if (buttons && (width < 540)) width = 540;
			var tablewidth = width + 4;
		}
		
		document.writeln('<div class="rteDiv">');
		if (buttons == true) {
			document.writeln('<table class="rteBack" cellpadding="0" cellspacing="0" id="Buttons1_' + rte + '" width="' + tablewidth + '">');
			document.writeln('	<tr>');
			document.writeln('		<td><img id="bold" class="rteImage" src="' + imagesPath + 'bold.gif" width="25" height="24" alt="Bold" title="Bold" onClick="rteCommand(\'' + rte + '\', \'bold\', \'\')"></td>');
			document.writeln('		<td><img class="rteImage" src="' + imagesPath + 'italic.gif" width="25" height="24" alt="Italic" title="Italic" onClick="rteCommand(\'' + rte + '\', \'italic\', \'\')"></td>');
			document.writeln('		<td><img class="rteImage" src="' + imagesPath + 'underline.gif" width="25" height="24" alt="Underline" title="Underline" onClick="rteCommand(\'' + rte + '\', \'underline\', \'\')"></td>');
			document.writeln('		<td><img class="rteVertSep" src="' + imagesPath + 'blackdot.gif" width="1" height="20" border="0" alt=""></td>');
			document.writeln('		<td><img class="rteImage" src="' + imagesPath + 'numbered_list.gif" width="25" height="24" alt="Ordered List" title="Ordered List" onClick="rteCommand(\'' + rte + '\', \'insertorderedlist\', \'\')"></td>');
			document.writeln('		<td><img class="rteImage" src="' + imagesPath + 'list.gif" width="25" height="24" alt="Unordered List" title="Unordered List" onClick="rteCommand(\'' + rte + '\', \'insertunorderedlist\', \'\')"></td>');
			document.writeln('		<td><img class="rteImage" src="' + imagesPath + 'hyperlink.gif" width="25" height="24" alt="Insert Link" title="Insert Link" onClick="insertLink(\'' + rte + '\')"></td>');
			document.writeln('		<td><img class="rteImage" src="' + imagesPath + 'image.gif" width="25" height="24" alt="Add Image" title="Add Image" onClick="AddImage1(\'' + rte + '\')"></td>');
			document.writeln('		<td width="100%"></td>');
			document.writeln('	</tr>');
			document.writeln('</table>');
		}
		document.writeln('<iframe id="' + rte + '" name="' + rte + '" width="' + width + 'px" height="' + height + 'px" src="' + includesPath + 'blank.htm"></iframe>');
		document.writeln('<iframe width="154" height="104" id="cp' + rte + '" src="' + includesPath + 'palette.htm" marginwidth="0" marginheight="0" scrolling="no" style="visibility:hidden; position: absolute;"></iframe>');
		document.writeln('<input type="hidden" id="hdn' + rte + '" name="' + rte + '" value="">');
		document.writeln('</div>');
		
		document.getElementById('hdn' + rte).value = html;
		enableDesignMode(rte, html, readOnly);
	} else {
		if (!readOnly) {
			document.writeln('<textarea name="' + rte + '" id="' + rte + '" style="width: ' + width + 'px; height: ' + height + 'px;">' + html + '</textarea>');
		} else {
			document.writeln('<textarea name="' + rte + '" id="' + rte + '" style="width: ' + width + 'px; height: ' + height + 'px;" readonly>' + html + '</textarea>');
		}
	}
}

function enableDesignMode(rte, html, readOnly) {
	var frameHtml = "<html id=\"" + rte + "\">\n";
	frameHtml += "<head>\n";
	//to reference your stylesheet, set href property below to your stylesheet path and uncomment
	if (cssFile.length > 0) {
		frameHtml += "<link media=\"all\" type=\"text/css\" href=\"" + cssFile + "\" rel=\"stylesheet\">\n";
	} else {
		frameHtml += "<style>\n";
		frameHtml += "body {\n";
		frameHtml += "	background: #FFFFFF;\n";
		frameHtml += "	margin: 0px;\n";
		frameHtml += "	padding: 0px;\n";
		frameHtml += "}\n";
		frameHtml += "</style>\n";
	}
	frameHtml += "</head>\n";
	frameHtml += "<body bgcolor='#cdcddc'>\n";
	frameHtml += html + "\n";
	frameHtml += "</body>\n";
	frameHtml += "</html>";
	
	if (document.all) {
		var oRTE = frames[rte].document;
		oRTE.open();
		oRTE.write(frameHtml);
		oRTE.close();
		if (!readOnly) oRTE.designMode = "On";
	} else {
		try {
			if (!readOnly) document.getElementById(rte).contentDocument.designMode = "on";
			try {
				var oRTE = document.getElementById(rte).contentWindow.document;
				oRTE.open();
				oRTE.write(frameHtml);
				oRTE.close();
				if (isGecko && !readOnly) {
					oRTE.addEventListener("keypress", kb_handler, true);
				}
			} catch (e) {
				alert("Error preloading content.");
			}
		} catch (e) {
			if (isGecko) {
				setTimeout("enableDesignMode('" + rte + "', '" + html + "', " + readOnly + ");", 10);
			} else {
				return false;
			}
		}
	}
}

function updateRTEs() {
	var vRTEs = allRTEs.split(";");
	for (var i = 0; i < vRTEs.length; i++) {
		updateRTE(vRTEs[i]);
	}
}

function updateRTE(rte) {
	var oHdnMessage = document.getElementById('hdn' + rte);
	var oRTE = document.getElementById(rte);
	var readOnly = false;
	
	if (isRichText && !readOnly) {
		if (oHdnMessage.value == null) oHdnMessage.value = "";
		if (document.all) {
			oHdnMessage.value = frames[rte].document.body.innerHTML;
		} else {
			oHdnMessage.value = oRTE.contentWindow.document.body.innerHTML;
		}
		
		//if there is no content (other than formatting) set value to nothing
		if (stripHTML(oHdnMessage.value.replace("&nbsp;", " ")) == "" 
			&& oHdnMessage.value.toLowerCase().search("<hr") == -1
			&& oHdnMessage.value.toLowerCase().search("<img") == -1) oHdnMessage.value = "";
		//fix for gecko
		if (escape(oHdnMessage.value) == "%3Cbr%3E%0D%0A%0D%0A%0D%0A") oHdnMessage.value = "";
	}
}

function rteCommand(rte, command, option) {
	var oRTE;
	if (document.all) {
		oRTE = frames[rte];
	} else {
		oRTE = document.getElementById(rte).contentWindow;
	}
	
	try {
		oRTE.focus();
	  	oRTE.document.execCommand(command, false, option);
		oRTE.focus();
	} catch (e) {
	}
}

function toggleHTMLSrc(rte) {
	var oRTE;
	if (document.all) {
		oRTE = frames[rte].document;
	} else {
		oRTE = document.getElementById(rte).contentWindow.document;
	}
	
	if (document.getElementById("chkSrc" + rte).checked) {
		showHideElement("Buttons1_" + rte, "hide");
		showHideElement("Buttons2_" + rte, "hide");
		if (document.all) {
			oRTE.body.innerText = oRTE.body.innerHTML;
		} else {
			var htmlSrc = oRTE.createTextNode(oRTE.body.innerHTML);
			oRTE.body.innerHTML = "";
			oRTE.body.appendChild(htmlSrc);
		}
	} else {
		showHideElement("Buttons1_" + rte, "show");
		showHideElement("Buttons2_" + rte, "show");
		if (document.all) {
			var output = escape(oRTE.body.innerText);
			output = output.replace("%3CP%3E%0D%0A%3CHR%3E", "%3CHR%3E");
			output = output.replace("%3CHR%3E%0D%0A%3C/P%3E", "%3CHR%3E");
			
			oRTE.body.innerHTML = unescape(output);
		} else {
			var htmlSrc = oRTE.body.ownerDocument.createRange();
			htmlSrc.selectNodeContents(oRTE.body);
			oRTE.body.innerHTML = htmlSrc.toString();
		}
	}
}

function getOffsetTop(elm) {
	var mOffsetTop = elm.offsetTop;
	var mOffsetParent = elm.offsetParent;
	var parents_up = 2; //the positioning div is 2 elements up the tree
	
	while(parents_up > 0) {
		mOffsetTop += mOffsetParent.offsetTop;
		mOffsetParent = mOffsetParent.offsetParent;
		parents_up--;
	}
	
	return mOffsetTop;
}

function getOffsetLeft(elm) {
	var mOffsetLeft = elm.offsetLeft;
	var mOffsetParent = elm.offsetParent;
	var parents_up = 2;
	
	while(parents_up > 0) {
		mOffsetLeft += mOffsetParent.offsetLeft;
		mOffsetParent = mOffsetParent.offsetParent;
		parents_up--;
	}
	
	return mOffsetLeft;
}

function selectFont(rte, selectname) {
	var idx = document.getElementById(selectname).selectedIndex;
	if (idx != 0) {
		var selected = document.getElementById(selectname).options[idx].value;
		var cmd = selectname.replace('_' + rte, '');
		rteCommand(rte, cmd, selected);
		document.getElementById(selectname).selectedIndex = 0;
	}
}

function kb_handler(evt) {
	var rte = evt.target.id;
	
	if (evt.ctrlKey) {
		var key = String.fromCharCode(evt.charCode).toLowerCase();
		var cmd = '';
		switch (key) {
			case 'b': cmd = "bold"; break;
			case 'i': cmd = "italic"; break;
			case 'u': cmd = "underline"; break;
		};

		if (cmd) {
			rteCommand(rte, cmd, null);
			
			evt.preventDefault();
			evt.stopPropagation();
		}
 	}
}

function insertHTML(html) {
	var rte = currentRTE;
	
	var oRTE;
	if (document.all) {
		oRTE = frames[rte];
	} else {
		oRTE = document.getElementById(rte).contentWindow;
	}
	
	oRTE.focus();
	if (document.all) {
		oRTE.document.selection.createRange().pasteHTML(html);
	} else {
		oRTE.document.execCommand('insertHTML', false, html);
	}
}

function showHideElement(element, showHide) {
	if (document.getElementById(element)) {
		element = document.getElementById(element);
	}
	
	if (showHide == "show") {
		element.style.visibility = "visible";
	} else if (showHide == "hide") {
		element.style.visibility = "hidden";
	}
}

function setRange(rte) {
	var oRTE;
	if (document.all) {
		oRTE = frames[rte];
		var selection = oRTE.document.selection; 
		if (selection != null) rng = selection.createRange();
	} else {
		oRTE = document.getElementById(rte).contentWindow;
		var selection = oRTE.getSelection();
		rng = selection.getRangeAt(selection.rangeCount - 1).cloneRange();
	}
}

function stripHTML(oldString) {
	var newString = oldString.replace(/(<([^>]+)>)/ig,"");
	
   newString = newString.replace(/\r\n/g," ");
   newString = newString.replace(/\n/g," ");
   newString = newString.replace(/\r/g," ");
	
	newString = trim(newString);
	
	return newString;
}

function trim(inputString) {
   if (typeof inputString != "string") return inputString;
   var retValue = inputString;
   var ch = retValue.substring(0, 1);
	
   while (ch == " ") {
      retValue = retValue.substring(1, retValue.length);
      ch = retValue.substring(0, 1);
   }
   ch = retValue.substring(retValue.length - 1, retValue.length);
	
   while (ch == " ") {
      retValue = retValue.substring(0, retValue.length - 1);
      ch = retValue.substring(retValue.length - 1, retValue.length);
   }
	
   while (retValue.indexOf("  ") != -1) {
      retValue = retValue.substring(0, retValue.indexOf("  ")) + retValue.substring(retValue.indexOf("  ") + 1, retValue.length);
   }
   return retValue;
}

function insertLink(rte) {
	var szURL = prompt("Enter a URL:");
	try {
		rteCommand(rte, "Unlink", null);
		rteCommand(rte, "CreateLink", szURL);
	} catch (e) {
		//do nothing
	}
}

function AddImage1(rte) {
	currentRTE = rte;
	window.open('/content/addimage/','addImage1','width=300,height=150,scrollbars=no,status=no,menubar=no');
}

function addImage(imagePath) {
	if ((imagePath != null) && (imagePath != "")) {
		rteCommand(currentRTE, 'InsertImage', imagePath);
	}
}