defmode = "normalmode";		// default mode (normalmode, advmode, helpmode)

if (defmode == "advmode") {
        helpmode = false;
        normalmode = false;
        advmode = true;
} else if (defmode == "helpmode") {
        helpmode = true;
        normalmode = false;
        advmode = false;
} else {
        helpmode = false;
        normalmode = true;
        advmode = false;
}
function chmode(swtch){
        if (swtch == 1){
                advmode = false;
                normalmode = false;
                helpmode = true;
                alert(help_mode);
        } else if (swtch == 0) {
                helpmode = false;
                normalmode = false;
                advmode = true;
                alert(adv_mode);
        } else if (swtch == 2) {
                helpmode = false;
                advmode = false;
                normalmode = true;
                alert(normal_mode);
        }
}

function AddText(NewCode) {
        if(document.all){
        	insertAtCaret(document.input.tnr, NewCode);
        	setfocus();
        } else{
        	document.input.tnr.value += NewCode;
        	setfocus();
        }
}

function storeCaret (textEl){
        if(textEl.createTextRange){
                textEl.caretPos = document.selection.createRange().duplicate();
        }
}

function insertAtCaret (textEl, text){
        if (textEl.createTextRange && textEl.caretPos){
                var caretPos = textEl.caretPos;
                caretPos.text += caretPos.text.charAt(caretPos.text.length - 2) == ' ' ? text + ' ' : text;
        } else if(textEl) {
                textEl.value += text;
        } else {
        	textEl.value = text;
        }
}



function bold() {
        if (helpmode) {
                alert(bold_help);
	} else if (document.selection && document.selection.type == "Text") {
		var range = document.selection.createRange();
		range.text = "[b]" + range.text + "[/b]";
        } else if (advmode) {
                AddTxt="[b] [/b]";
                AddText(AddTxt);
        } else {  
                txt=prompt(bold_normal,text_input);     
                if (txt!=null) {           
                        AddTxt="[b]"+txt;
                        AddText(AddTxt);
                        AddText("[/b]");
                }       
        }
}

function italicize() {
        if (helpmode) {
                alert(italicize_help);
	} else if (document.selection && document.selection.type == "Text") {
		var range = document.selection.createRange();
		range.text = "[i]" + range.text + "[/i]";
        } else if (advmode) {
                AddTxt="[i] [/i]";
                AddText(AddTxt);
        } else {   
                txt=prompt(italicize_normal,text_input);     
                if (txt!=null) {           
                        AddTxt="[i]"+txt;
                        AddText(AddTxt);
                        AddText("[/i]");
                }               
        }
}


function center() {
        if (helpmode) {
                alert(center_help);
	} else if (document.selection && document.selection.type == "Text") {
		var range = document.selection.createRange();
		range.text = "[align=center]" + range.text + "[/align]";
        } else if (advmode) {
                AddTxt="[align=center] [/align]";
                AddText(AddTxt);
        } else {  
                txt=prompt(center_normal,text_input);     
                if (txt!=null) {          
                        AddTxt="\r[align=center]"+txt;
                        AddText(AddTxt);
                        AddText("[/align]");
                }              
        }
}

function hyperlink() {
        if (helpmode) {
                alert(link_help);
        } else if (advmode) {
                AddTxt="[url] [/url]";
                AddText(AddTxt);
        } else { 
                txt2=prompt(link_normal,""); 
                if (txt2!=null) {
                        txt=prompt(link_normal_input,"http://");      
                        if (txt!=null) {
                                if (txt2=="") {
                                        AddTxt="[url]"+txt;
                                        AddText(AddTxt);
                                        AddText("[/url]");
                                } else {
                                        AddTxt="[url="+txt+"]"+txt2;
                                        AddText(AddTxt);
                                        AddText("[/url]");
                                }         
                        } 
                }
        }
}

function image() {
        if (helpmode){
                alert(image_help);
        } else if (advmode) {
                AddTxt="[img] [/img]";
                AddText(AddTxt);
        } else {  
                txt=prompt(image_normal,"http://");    
                if(txt!=null) {            
                        AddTxt="\r[img]"+txt;
                        AddText(AddTxt);
                        AddText("[/img]");
                }       
        }
}



function underline() {
        if (helpmode) {
                alert(underline_help);
	} else if (document.selection && document.selection.type == "Text") {
		var range = document.selection.createRange();
		range.text = "[u]" + range.text + "[/u]";
        } else if (advmode) {
                AddTxt="[u] [/u]";
                AddText(AddTxt);
        } else {  
                txt=prompt(underline_normal,text_input);
                if (txt!=null) {           
                        AddTxt="[u]"+txt;
                        AddText(AddTxt);
                        AddText("[/u]");
                }               
        }
}

function setfocus() {
        document.input.tnr.focus();
}