// -------------------------------------
//  Browser Check
// -------------------------------------

var clientPC = navigator.userAgent.toLowerCase(); // Get client info
var clientVer = parseInt(navigator.appVersion); // Get browser version
var is_ie = ((clientPC.indexOf("msie") != -1) && (clientPC.indexOf("opera") == -1));
var is_nav = ((clientPC.indexOf('mozilla')!=-1) && (clientPC.indexOf('spoofer')==-1)
      		 && (clientPC.indexOf('compatible') == -1) && (clientPC.indexOf('opera')==-1)
       	 && (clientPC.indexOf('webtv')==-1) && (clientPC.indexOf('hotjava')==-1));
var is_moz = 0;

var is_win = ((clientPC.indexOf("win")!=-1) || (clientPC.indexOf("16bit") != -1));
var is_mac = (clientPC.indexOf("mac")!=-1);


// ------------------------------------
//  Array Helper Functions - Comment Form
// ------------------------------------

        function getarraysize(thearray)
        {
            for (i = 0; i < thearray.length; i++)
            {
                if ((thearray[i] == "undefined") || (thearray[i] == "") || (thearray[i] == null))
                {
                    return i;
                }
            }

            return thearray.length;
        }

        // Array push
        function arraypush(thearray, value)
        {
            thearray[getarraysize(thearray)] = value;
        }

        // Array pop
        function arraypop(thearray)
        {
            thearraysize = getarraysize(thearray);
            retval = thearray[thearraysize - 1];
            delete thearray[thearraysize - 1];
            return retval;
        }


        var selField  = false;
        var selMode   = "normal";

        var no_cursor     = "In order to use these buttons you must first place your cursor in a field.";
        var url_text      = "Enter the hyperlink URL";
        var webpage_text  = "Enter the title of the link";
        var title_text	  = "Optional: Enter a title attribute";
        var image_text    = "Enter the image URL";
        var email_text    = "Enter the email address";
        var email_title   = "Enter the link title (or leave the field empty to use the email address as the title.)";
        var enter_text    = "Enter the text you want to format";


				var button_0 = 0;
				var button_1 = 0;
				var button_2 = 0;
				var button_3 = 0;
				var button_4 = 0;

        var tagarray  	= new Array();
        var usedarray 	= new Array();
        var running		= 0;

        function nullo()
        {
            return;
        }

        //  State change

        function styleswap(link)
        {
            if (document.getElementById(link).className == 'htmlButtonA')
            {
                document.getElementById(link).className = 'htmlButtonB';
            }
            else
            {
                document.getElementById(link).className = 'htmlButtonA';
            }

			if (document.getElementById('close_all').className == 'htmlButtonA')
			{
				document.getElementById('close_all').className = 'htmlButtonB';
			}
        }

        //  Set button mode

        function setmode(which)
        {
            if (which == 'guided')
                selMode = 'guided';
            else
                selMode = 'normal';
        }

        //  Dynamically set the textarea name

        function setFieldName(which)
        {
            if (which != selField)
            {
                selField = which;

                clear_state();

                tagarray  = new Array();
                usedarray = new Array();
                running	  = 0;
            }
        }

        // Clear state

        function clear_state()
        {
            if (usedarray[0])
            {
                while (usedarray[0])
                {
                    clearState = arraypop(usedarray);
                    eval(clearState + " = 0");
                    document.getElementById(clearState).className = 'htmlButtonA';
                }

				if (document.getElementById('close_all').className == 'htmlButtonB')
				{
					document.getElementById('close_all').className = 'htmlButtonA';
				}
            }
        }

        // Insert single tag

        function singleinsert(tagOpen)
        {
            if ( ! selField)
            {
                alert(no_cursor);

                return false;
            }

            eval("document.entryform." + selField + ".value += tagOpen");

            curField = eval('document.entryform.' + selField);
            curField.blur();
            curField.focus();
        }


        // Insert tag
        function taginsert(item, tagOpen, tagClose)
        {

            // Determine which tag we are dealing with

            var which = eval('item.name');

            if ( ! selField)
            {
                alert(no_cursor);

                return false;
            }

            if (selMode == 'guided')
            {
                data = prompt(enter_text, "");

                if ((data != null) && (data != ""))
                {
                    result =  tagOpen + data + tagClose;

                    eval("document.entryform." + selField + ".value += result");
                }

                curField = eval('document.entryform.' + selField);

                curField.blur();
                curField.focus();

                return;
            }


            // Is this a Windows user?

            var theSelection = false;
            eval("var theField = document.entryform." + selField + ";");

            if ((clientVer >= 4) && is_ie && is_win)
            {
                theSelection = document.selection.createRange().text;
            }

            // If so, add tags around selection

            if (theSelection)
            {
                var tags = tagOpen;
                var tage = tagClose;

                document.selection.createRange().text = tags + theSelection + tage;

                curField = eval('document.entryform.' + selField);

                curField.blur();
                curField.focus();
                theSelection = '';

                return;
            }
            else if (theField.selectionEnd && (theField.selectionEnd - theField.selectionStart > 0))
			{
				var selLength = theField.textLength;
				var selStart = theField.selectionStart;
				var selEnd = theField.selectionEnd;
				if (selEnd == 1 || selEnd == 2)
					selEnd = selLength;

				var s1 = (theField.value).substring(0,selStart);
				var s2 = (theField.value).substring(selStart, selEnd)
				var s3 = (theField.value).substring(selEnd, selLength);
				theField.value = s1 + tagOpen + s2 + tagClose + s3;
				return;
			}

            // Add single open tags

            if (eval(which) == 0)
            {
                var result = tagOpen;

                eval("document.entryform." + selField + ".value += result");
                eval(which + " = 1");

                arraypush(tagarray, tagClose);
                arraypush(usedarray, which);

                running++;

                styleswap(which);
            }
            else
            {
                // Close tags

                n = 0;

                for (i = 0 ; i < tagarray.length; i++ )
                {
                    if (tagarray[i] == tagClose)
                    {
                        n = i;

                        running--;

						while (tagarray[n])
						{
							closeTag = arraypop(tagarray);
							eval("document.entryform." + selField + ".value += closeTag");
						}

						while (usedarray[n])
						{
							clearState = arraypop(usedarray);
							eval(clearState + " = 0");
							document.getElementById(clearState).className = 'htmlButtonA';
						}
                    }
                }

				if (running <= 0 && document.getElementById('close_all').className == 'htmlButtonB')
				{
					document.getElementById('close_all').className = 'htmlButtonA';
				}

            }

            curField = eval('document.entryform.' + selField);
            curField.blur();
            curField.focus();
        }

        // Prompted tags

        function promptTag(which)
        {
            if ( ! selField)
            {
                alert(no_cursor);

                return;
            }

            if ( ! which)
                return;

            var theSelection = "";
            eval("var theField = document.entryform." + selField + ";");

            if ((clientVer >= 4) && is_ie && is_win)
            {
                theSelection = document.selection.createRange().text;
            }
            else if (theField.selectionEnd && (theField.selectionEnd - theField.selectionStart > 0))
			{
				var selLength = theField.textLength;
				var selStart = theField.selectionStart;
				var selEnd = theField.selectionEnd;
				if (selEnd == 1 || selEnd == 2)
					selEnd = selLength;

				var s1 = (theField.value).substring(0,selStart);
				var s2 = (theField.value).substring(selStart, selEnd)
				var s3 = (theField.value).substring(selEnd, selLength);
				theSelection = s2;
			}



            if (which == "link")
            {
                var URL = prompt(url_text, "http://");

                if ( ! URL || URL == 'http://' || URL == null)
                    return;

                var Name = prompt(webpage_text, theSelection);

                if ( ! Name || Name == null)
                    return;

//IomemoEEHack: Omit promting for url title tag
//                var Title = prompt(title_text, theSelection);
//                if (Title == null)
//                    return;
//                if (Title == "")
//                {
//                	var Title = Name;
//                }
//End
              var Link = '<a href="' + URL + '" title="' + Title + '">' + Name + '<'+'/a>';
            }


            if (which == "email")
            {
                var Email = prompt(email_text, "");

                if ( ! Email || Email == null)
                    return;

                var Title = prompt(email_title, theSelection);

                if (!Title || Title == null)
                	return;

                if (Title == "")
                    Title = Email;
              var Link = '<a href="mailto:' + Email + '">' + Title + '<'+'/a>';
            }

            if (which == "image")
            {
                var URL   = prompt(image_text, "http://");

                if ( ! URL || URL == null)
                    return;

                var Link = '<img src="' + URL + '" />';
            }

        	if ((clientVer >= 4) && is_ie && is_win && theSelection != "")
            {
                document.selection.createRange().text = Link;
            }
            else if (theField.selectionEnd && (theField.selectionEnd - theField.selectionStart > 0))
			{
				theField.value = s1 + Link + s3;
			}
			else
			{
            	eval("document.entryform." + selField + ".value += Link");
            }

            theSelection = '';
            curField = eval('document.entryform.' + selField);
            curField.blur();
            curField.focus();
            return;
        }

        // Close all tags

        function closeall()
        {
            if (tagarray[0])
            {
                while (tagarray[0])
                {
                    closeTag = arraypop(tagarray);
                    eval("document.entryform." + selField + ".value += closeTag");
                }
            }

            clear_state();
            running = 0;
            curField = eval('document.entryform.' + selField);
            curField.focus();
        }



	function insertAtCaret(obj, text) {
		if(document.selection) {
			obj.focus();
			var orig = obj.value.replace(/\r\n/g, "\n");
			var range = document.selection.createRange();

			if(range.parentElement() != obj) {
				return false;
			}

			range.text = text;

			var actual = tmp = obj.value.replace(/\r\n/g, "\n");

			for(var diff = 0; diff < orig.length; diff++) {
				if(orig.charAt(diff) != actual.charAt(diff)) break;
			}

			for(var index = 0, start = 0;
				tmp.match(text)
					&& (tmp = tmp.replace(text, ""))
					&& index <= diff;
				index = start + text.length
			) {
				start = actual.indexOf(text, index);
			}
		}
		else if(obj.selectionStart) {
			var start = obj.selectionStart;
			var end   = obj.selectionEnd;

			obj.value = obj.value.substr(0, start)
				+ text
				+ obj.value.substr(end, obj.value.length);
		}

		if(start != null) {
			setCaretTo(obj, start + text.length);
		} else {
			obj.value += text;
		}
	}

	function setCaretTo(obj, pos) {
		if(obj.createTextRange) {
			var range = obj.createTextRange();
			range.move('character', pos);
			range.select();
		} else if(obj.selectionStart) {
			obj.focus();
			obj.setSelectionRange(pos, pos);
		}
	}