// ---------------
// Toggles visibility of the specified element.
// ---------------
function toggleVisibility(elemId)
{
	var elem = document.getElementById(elemId);
	
	if (elem)
	{
		if (elem.style.display == 'none')
		{		
			elem.style.display = 'block';
		}
		else
		{			
			elem.style.display = 'none';
		}
	}
}

// ------------------------------------------------------------
// Changes the height of a number of elements so they are the same
// height. The input param is an array with elements-id:s.
// ------------------------------------------------------------
function adaptElementHeight(divNameArr, minHeight)
{
	// This script messes up the page when it's displayed in EPi's
	// edit mode so we need this rather ugly work-around to prevent
	// the script from running when the page is viewed in edit mode.
	if (window.parent.name == 'EditPanel')
	{
		return;
	}
	
    var height = minHeight;
    var divArr = Array();
    
    // Loop over all the divs to get the height if the highest
    for (i = 0; i < divNameArr.length; i++)
    {
        divArr[i] = document.getElementById(divNameArr[i]);
        
        if (divArr[i])
        {
			// We set the height to auto to erase any previously hardcoded pixel
			// values which will otherwise prevent this function from running correctly
			// more than one time. It's useful to be able to call this function
			// again when dynamic content is displayed on the page.
	        divArr[i].style.height = 'auto';
	        
	        if (divArr[i].clientHeight > height)
	        {
				height = divArr[i].clientHeight;
			}
        }
    }    

    // Set the height for all divs
    for (i = 0; i < divArr.length; i++)
    {
        if (divArr[i])
        {
            divArr[i].style.height = height + 'px';
        }
    }
}

// ------------------------------------------------------------
// Sets the height of all the children of the specified element
// to the height of the highest child.
// ------------------------------------------------------------
function adaptChildHeight(parentId)
{
	// This script messes up the page when it's displayed in EPi's
	// edit mode so we need this rather ugly work-around to prevent
	// the script from running when the page is viewed in edit mode.
	if (window.parent.name == 'EditPanel')
	{
		return;
	}
    var parentElement = document.getElementById(parentId);
    if (parentElement && parentElement.childNodes.length > 2)
    {
        var maxHeight = 0;

        // Loop over all children to find the maxHeight
        for (i = 0; i < parentElement.childNodes.length; i++)
        {
            if (parentElement.childNodes[i].clientHeight > maxHeight)
            {
                maxHeight = parentElement.childNodes[i].clientHeight;
            }
        }

        // Loop over all children and set the height
        for (i = 0; i < parentElement.childNodes.length; i++)
        {
            if (parentElement.childNodes[i].style && 
                (parentElement.childNodes[i].style.clear != 'both'))
            {
                parentElement.childNodes[i].style.height = maxHeight + 'px';
            }
        }
    }
}

// ------------------------------------------------------------
// This function will fire a click event on the specified control when the 
// enter key is pressed in a text field. Attach this function to the 
// onkeypress-event on the text field like this:
// <input type="text" onkeypress="return fireClickOnEnter(event, 'IdOfControlToFireClickOn');">
// ------------------------------------------------------------
function fireClickOnEnter(evt, controlId)
{
    var control = document.getElementById(controlId);
    var keyCode = (typeof window.event == 'object') ? window.event.keyCode : evt.keyCode;

    // If enter is pressed -> fire click-event on the control
    if (control && (keyCode == 13))
    {
        control.focus();
        control.click();
        return false;
    }
    else
    {
        return true;
    }
}

// ------------------------------------------------------------
// This function will fire a postbackon the specified control when the 
// enter key is pressed in a text field. Attach this function to the 
// onkeypress-event on the text field like this:
// <input type="text" onkeypress="return postbackOnEnter(event, 'IdOfControlToFirePostbackOn');">
// ------------------------------------------------------------
function postbackOnEnter(evt, controlId)
{
    var keyCode = (typeof window.event == 'object') ? window.event.keyCode : evt.keyCode;

    // If enter is pressed -> do a postback
    if (keyCode == 13)
    {
		__doPostBack(controlId,'');
		return false;
    }
    else
    {
        return true;
    }
}

// ------------------------------------------------------------
// Returns the x coordinate of the specified object
// ------------------------------------------------------------
function findPosX(obj)
{
    var curleft = 0;
    if (obj.offsetParent)
    {
        while (obj.offsetParent)
        {
            curleft += obj.offsetLeft
            obj = obj.offsetParent;
        }
    }
    else if (obj.clientLeft)
    {
        curleft += obj.clientLeft;
    }
    return curleft;
}

// ------------------------------------------------------------
// Returns the y coordinate of the specified object
// ------------------------------------------------------------
function findPosY(obj)
{
    var curtop = 0;
    if (obj.offsetParent)
    {
        while (obj.offsetParent)
        {
            curtop += obj.offsetTop
            obj = obj.offsetParent;
        }
    }
    else if (obj.clientTop)
    {
        curtop += obj.clientTop;
    }
    return curtop;
}

// ---------------
// Returns the size of the viewport.
// ---------------
function getViewportSize()
{
    size = {};
    if (window.innerHeight)
    {
    	size.width  = window.innerWidth;
    	size.height = window.innerHeight;
    }
    else if (document.documentElement && document.documentElement.clientHeight)
    {
    	size.width  = document.documentElement.clientWidth;
    	size.height = document.documentElement.clientHeight;
    }
    else if (document.body)
    {
    	size.width  = document.body.clientWidth;
    	size.height = document.body.clientHeight;
    }
    return size;
}

// ------------------------------------------------------------
// Builds an html-page for printing
// ------------------------------------------------------------
function printPage(pagename, appRoot) 
{
	if (!window.print)
	{
		window.status = 'No print';
		return;
	}

	// Get the main content area and other stuff we need
	var contentdiv = document.getElementById('ContentDiv');

	if (contentdiv)
	{
		var contentHtml = '<div style="padding: 0 20px 0 20px">' + contentdiv.innerHTML + '</div>';

		var beginHtml = 
		      '<html>' +
			  '<head>' +
			  '<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">' + 
			  '<link rel="stylesheet" type="text/css" href="' + appRoot + 'styles/structure.css">' +
			  '<link rel="stylesheet" type="text/css" href="' + appRoot + 'styles/main.css">' +
			  '<link rel="stylesheet" type="text/css" href="' + appRoot + 'styles/units.css">' +
			  '<link rel="stylesheet" type="text/css" href="' + appRoot + 'styles/print.css">' +
			  '<title>Hjärt-Lungfonden - ' + pagename + '</title>' +
			  '</head>' +
			  '<body style="margin: 10px 0px 10px 0px">';

		var footerHtml = '<div style="margin: 20px 20px 0 20px; padding: 5px 0 0 0; border-top: solid 2px #ddd" class="Bold">Hjärt-Lungfonden - Tel: 08-566 24 200 - E-post: info@hjart-lungfonden.se</div>';
		var endHtml = '</body></html>';

		var printWin = window.open('about:blank','','width=700,height=600,scrollbars=yes,toolbar=yes');
		printWin.document.open();
		printWin.document.write(beginHtml + 
		                        contentHtml + 
		                        footerHtml +
		                        endHtml);
		printWin.document.close();

		printWin.print();
		printWin.close();
	}
}

// ------------------------------------------------------------
// Adapt the main divs on a campaign page.
// ------------------------------------------------------------
function adaptMainCampaignDivs()
{
	adaptElementHeight(new Array('LeftAreaDiv','RightAreaDiv'), 400);
	positionCampaignBottomImage();
}

// ------------------------------------------------------------
// Positions the bottom image for campaigns at the bottom of the page.
// ------------------------------------------------------------
function positionCampaignBottomImage()
{
	var bottomImageDiv = document.getElementById('CampaignBottomImage');
	if (bottomImageDiv)
	{
		var viewSize = getViewportSize();
		var top = Math.max(document.body.clientHeight, (viewSize.height - gCampaignBottomImageHeight));
		bottomImageDiv.style.top = top + 'px';
	}
}

// ---------------
// Toggles the visibility of a campaign comment.
// ---------------
function toggleComment(id)
{
	toggleVisibility('CommentLess' + id);
	toggleVisibility('CommentMore' + id);
	adaptMainCampaignDivs();
}

// ---------------
// Updates the flash when a new value is selected in the amount drop-down
// ---------------
function updateCampaignHeartFlash(select, moduleId)
{
	var value = select.options[select.selectedIndex].value;
	var heartFlash = document.getElementById('moduleflash_' + moduleId);

	if (heartFlash)
	{
		heartFlash.sendValueToFlash(value);
	}
}