// Function to add a DOM node to a page
function addPageElement(parent,tagName,attributes,text)
{
	// Are we adding a simple text node or something more complex?
	if (tagName=='text')
	{
		var curElement = document.createTextNode(text);
	}
	else
	{
		// Create our new node
		var curElement = document.createElement(tagName);
		
		// Go through each of our attributes
		for(property in attributes)
		{
			// Work-around for adding event handlers, styles, and classes for IE
			if (curElement.attachEvent)
			{
				if (property.substring(0,2)=='on')
				{
					//eval('curElement.attachEvent(\''+property.toLowerCase()+'\','+attributes[property].replace('()','')+')');
					eval('curElement.'+property+'=function (){'+attributes[property]+'}');
				}
				else if (property=='style')
					curElement.style.cssText=attributes[property];
				else if (property=='class')
					curElement.setAttribute('className',attributes[property]);
				else
					curElement.setAttribute(property,attributes[property]);
			}
			else
				curElement.setAttribute(property,attributes[property]);
		}
		
		// Do we want to add some text while we are at it?
		if (text!='')
		{
			var eleText = document.createTextNode(text);
			curElement.appendChild(eleText);
		}
	}
	
	// Add the node
	parent.appendChild(curElement);
	
	// Return our created node
	return curElement;
}

// Function to completely clear a node of child elements
function emptyElement(element)
{
	// Go through each child and erase it
	while (element.firstChild)
		element.removeChild(element.firstChild);
}

// Function to completly destroy an element and all of its children
function removeElement(element)
{
	// Get the parent of this element, then remove the element from it
	var parent;
	parent=element.parentNode;
	parent.removeChild(element);
}

// Function to move a node around under its parent node
function moveElement(element,destination,parent)
{
	// Are we moving to a different parent?
	if (parent=='')
		parent=element.parentNode;
	
	// Get our current location within this parent
	for(var x=0; x<parent.childNodes.length; x++)
		if(parent.childNodes[x]==element)
			index=x;
	
	if(!destination.substring)		// We got a specific index
	{
		if (index<destination+1)
			destination++;
		
		if (destination+1<parent.childNodes.length)
			parent.insertBefore(element,parent.childNodes[destination+1]);
		else
			parent.appendChild(element);
	}
	else
	{
		if (destination=='first')			// We want to be first
		{
			var firstNode=parent.firstChild;
			parent.insertBefore(element,firstNode);
		}
		else if (destination=='last')		// We want to be last
		{
			parent.appendChild(element);
		}
		else if ((destination.substring(0,1)=='-' || destination=='up') && parent==element.parentNode)	// We want to move up, only works with same parent
		{
			// First get how many we want to move
			var count;
			if (destination=='up')
				count=1;
			else
				count=parseInt(destination.replace('-',''));
			
			// Make sure we won't go below 0
			if (index-count>=0)
				parent.insertBefore(element,parent.childNodes[index-count]);
		}
		else if ((destination.substring(0,1)=='+' || destination=='down') && parent==element.parentNode)	// We want to move down, only works with same parent
		{
			// First get how many we want to move
			var count;
			if (destination=='down')
				count=1;
			else
				count=parseInt(destination.replace('+',''));
			
			// Make sure we won't go over the end, since we are appending afterward if we need to be the last node we need a special case
			if (index+count<parent.childNodes.length-1)
				parent.insertBefore(element,parent.childNodes[index+count+1]);
			else
				parent.appendChild(element);
		}
	}
}

// Easy method to get node values
function sNV(element,tag)
{
	if (element && element.getElementsByTagName(tag).item(0) && element.getElementsByTagName(tag).item(0).childNodes[0])
		return element.getElementsByTagName(tag).item(0).childNodes[0].nodeValue;
	else
		return '';
}

// Function to toggle an element to display or not
function toggleDisplay(element,status)
{
	if (element.style.display=='none' || status=='show')
		element.style.display='';
	else
		element.style.display='none';
}

// Function to get absolute coordinates of an object
function findCoords(obj)
{
	var curLeft=0;
	var curTop=0;
	var curHeight=0;
	var curWidth=0;
	
	// Get height/width
	curHeight=obj.offsetHeight;
	curWidth=obj.offsetWidth;
	
	// Cycle up through the offsets until we reach the overall body
	if (obj.offsetParent)
	{
		curLeft = obj.offsetLeft
		curTop = obj.offsetTop
		while (obj = obj.offsetParent)
		{
			curLeft += obj.offsetLeft
			curTop += obj.offsetTop
		}
	}
	
	// Return x,y,width,height
	return [curLeft,curTop,curWidth,curHeight];
}

// Function to get complete style of an element
function getCurrentStyle(element,property)
{
	if (ie)
		return eval('element.currentStyle.'+property);
	else
		return eval('window.getComputedStyle(element,null).'+property);
}

function checkAll(form){
	for(var i=0; i < document.getElementById(form).elements.length; i++)
		if (document.getElementById(form).elements[i].type=='checkbox')
			document.getElementById(form).elements[i].checked = 'checked';
}
function uncheckAll(form){
	for(var i=0; i < document.getElementById(form).elements.length; i++)
		if (document.getElementById(form).elements[i].type=='checkbox')
			document.getElementById(form).elements[i].checked = '';
}

// Clone of PHP array_key_exists
function array_key_exists(needle,haystack)
{
    for (var x in haystack)
    {
        if (x==needle)
            return true;
    }
	
    return false;
}

// Remove an element from an array by its key
function array_unset(array,key)
{
	var return_array = new Array();
	
    for (var k in array)
	{
        if(k!=key)
           return_array[k]=array[k];
    }

    return return_array;
}