var edButtons = new Array();

var edOpenTags = new Array();


function edButton(id, display, tagStart, tagEnd, access, open) {
	this.id = id;				// used to name the toolbar button
	this.display = display;		// label on button
	this.tagStart = tagStart; 	// open tag
	this.tagEnd = tagEnd;		// close tag
	this.access = access;			// set to -1 if tag does not need to be closed
	this.open = open;			// set to -1 if tag does not need to be closed
}




edButtons.push(
	new edButton(
		'ed_bold'
		,'B'
		,'<strong>'
		,'</strong>'
		,'b'
	)
);



edButtons.push(
	new edButton(
		'ed_em'
		,'EM'
		,'<em>'
		,'</em>\n\n'
		,'3'
	)
);


/*
edButtons.push(
	new edButton(
		'ed_img'
		,'IMG'
		,''
		,''
		,'m'
		,-1
	)
); 

*/


edButtons.push(
	new edButton(
		'ed_code'
		,'CODE'
		,'<code>'
		,'</code>'
		,'c'
	)
);


edButtons.push(
	new edButton(
		'ed_link'
		,'Link'
		,''
		,'</a>'
		,'a'
	)
); // special case





edButtons.push(
	new edButton(
		'ed_block'
		,'B-QUOTE'
		,'<blockquote>'
		,'</blockquote>'
		,'q'
	)
);




/*
edButtons.push(
	new edButton(
		'ed_italic'
		,'I'
		,'<em>'
		,'</em>'
		,'i'
	)
);
*/





function edAddTag(which, button) {
	if (edButtons[button].tagEnd != '') {
		edOpenTags[which][edOpenTags[which].length] = button;
		document.getElementById(edButtons[button].id + '_' + which).value = '/' + document.getElementById(edButtons[button].id + '_' + which).value;
	}
}

function edRemoveTag(which, button) {
	for (i = 0; i < edOpenTags[which].length; i++) {
		if (edOpenTags[which][i] == button) {
			edOpenTags[which].splice(i, 1);
			document.getElementById(edButtons[button].id + '_' + which).value = document.getElementById(edButtons[button].id + '_' + which).value.replace('/', '');
		}
	}
}


function edCheckOpenTags(which, button) {
	var tag = 0;
	for (i = 0; i < edOpenTags[which].length; i++) {
		if (edOpenTags[which][i] == button) {
			tag++;
		}
	}
	if (tag > 0) {
		return true; // tag found
	}
	else {
		return false; // tag not found
	}
}	

function edCloseAllTags(which) {
	var count = edOpenTags[which].length;
	for (o = 0; o < count; o++) {
		edInsertTag(which, edOpenTags[which][edOpenTags[which].length - 1]);
	}
}



// insertion code

function edInsertTag(which, i) {
    myField = document.getElementById(which);
	//IE support
	if (document.selection) {
		myField.focus();
	    sel = document.selection.createRange();
		if (sel.text.length > 0) {
			sel.text = edButtons[i].tagStart + sel.text + edButtons[i].tagEnd;
		}
		else {
			if (!edCheckOpenTags(which, i) || edButtons[i].tagEnd == '') {
				sel.text = edButtons[i].tagStart;
				edAddTag(which, i);
			}
			else {
				sel.text = edButtons[i].tagEnd;
				edRemoveTag(which, i);
			}
		}
		myField.focus();
	}
	//MOZILLA/NETSCAPE support
	else if (myField.selectionStart || myField.selectionStart == '0') {
		var startPos = myField.selectionStart;
		var endPos = myField.selectionEnd;
		var cursorPos = endPos;
		var scrollTop = myField.scrollTop;
		if (startPos != endPos) {
			myField.value = myField.value.substring(0, startPos)
			              + edButtons[i].tagStart
			              + myField.value.substring(startPos, endPos) 
			              + edButtons[i].tagEnd
			              + myField.value.substring(endPos, myField.value.length);
			cursorPos += edButtons[i].tagStart.length + edButtons[i].tagEnd.length;
		}
		else {
			if (!edCheckOpenTags(which, i) || edButtons[i].tagEnd == '') {
				myField.value = myField.value.substring(0, startPos) 
				              + edButtons[i].tagStart
				              + myField.value.substring(endPos, myField.value.length);
				edAddTag(which, i);
				cursorPos = startPos + edButtons[i].tagStart.length;
			}
			else {
				myField.value = myField.value.substring(0, startPos) 
				              + edButtons[i].tagEnd
				              + myField.value.substring(endPos, myField.value.length);
				edRemoveTag(which, i);
				cursorPos = startPos + edButtons[i].tagEnd.length;
			}
		}
		myField.focus();
		myField.selectionStart = cursorPos;
		myField.selectionEnd = cursorPos;
		myField.scrollTop = scrollTop;
	}
	else {
		if (!edCheckOpenTags(which, i) || edButtons[i].tagEnd == '') {
			myField.value += edButtons[i].tagStart;
			edAddTag(which, i);
		}
		else {
			myField.value += edButtons[i].tagEnd;
			edRemoveTag(which, i);
		}
		myField.focus();
	}
}



function edInsertContent(which, myValue) {
    myField = document.getElementById(which);
	//IE support
	if (document.selection) {
		myField.focus();
		sel = document.selection.createRange();
		sel.text = myValue;
		myField.focus();
	}
	//MOZILLA/NETSCAPE support
	else if (myField.selectionStart || myField.selectionStart == '0') {
		var startPos = myField.selectionStart;
		var endPos = myField.selectionEnd;
		var scrollTop = myField.scrollTop;
		myField.value = myField.value.substring(0, startPos)
		              + myValue 
                      + myField.value.substring(endPos, myField.value.length);
		myField.focus();
		myField.selectionStart = startPos + myValue.length;
		myField.selectionEnd = startPos + myValue.length;
		myField.scrollTop = scrollTop;
	} else {
		myField.value += myValue;
		myField.focus();
	}
}



function edInsertImage(which) {
    myField = document.getElementById(which);
	var myValue = prompt('Enter the URL of the image', 'http://');
	if (myValue) {
		myValue = '<img src="' 
				+ myValue 
				+ '" alt="' + prompt('Enter a description of the image', '') 
				+ '" />';
		edInsertContent(which, myValue);
	}
}


function edInsertLink(which, i, defaultValue) {
    myField = document.getElementById(which);
	if (!defaultValue) {
		defaultValue = 'http://';
	}
	if (!edCheckOpenTags(which, i)) {
		var URL = prompt('Enter the URL' ,defaultValue);
		if (URL) {
			edButtons[i].tagStart = '<a href="' + URL + '" target="_blank">';
			edInsertTag(which, i);
		}
	}
	else {
		edInsertTag(which, i);
	}
}


function edShowButton(which, button, i) {
	if (button.access) {
		var accesskey = ' accesskey = "' + button.access + '"'
	}
	else {
		var accesskey = '';
	}
	switch (button.id) {
		case 'ed_img':
			document.write('<input type="button" id="' + button.id + '_' + which + '" ' + accesskey + ' class="ed_button" onclick="edInsertImage(\'' + which + '\');" value="' + button.display + '" />');
			break;
		case 'ed_link':
			document.write('<input type="button" id="' + button.id + '_' + which + '" ' + accesskey + ' class="ed_button" onclick="edInsertLink(\'' + which + '\', ' + i + ');" value="' + button.display + '" />');
			break;
		default:
			document.write('<input type="button" id="' + button.id + '_' + which + '" ' + accesskey + ' class="ed_button" onclick="edInsertTag(\'' + which + '\', ' + i + ');" value="' + button.display + '"  />');
			break;
	}
}





function edToolbar(which) {
	document.write('<div id="ed_toolbar_' + which + '"><span>');

	for (i = 0; i < edButtons.length; i++) {
		edShowButton(which, edButtons[i], i);
	}


		document.write(	'<input type="button" id="ed_close_' + which + '" class="ed_button" onclick="edCloseAllTags(\'' + which + '\');" value="Close Tags" />');
		
	document.write('</span>');
//	edShowLinks();
	document.write('</div>');
    edOpenTags[which] = new Array();
}