//This function is defined to use for the forms, when focus is set on any field it will take the default text if any...
//this will take form element reference as the only parameter....
//internally we have to provide the default text for any particular text field..... 
function setFieldValue(el)
{
		if(el.value == 'wachtwoord' || el.value == 'e-mail adres')
		{
			el.value = "";
		}
}

function showElement(divId)
{
	document.getElementById(divId).style.display = "block";
	
}

function hideElement(divId)
{
	document.getElementById(divId).style.display = "none";
}


function changeClass(divId,divClass)
{
	document.getElementById(divId).className = divClass;
}


function delPhoto(id)
{
	new Ajax.Request('gebruikers/del_photo.php',
		{
			method:'post',
			parameters:{id:id},
			onSuccess:function(transport)
			{
				var response = transport.responseText;
			},
			onFailure:function()
			{
				alert('some thing went wrong');
			}
		});
}


function checkSearchElements()
{
	if(document.getElementById('search_all').checked)
	{
		for(var i=1; i<=5; i++)
		{
			document.getElementById('material_keywords_'+i).checked = 'checked';
		}
	}
	else
	{
		for(var i=1; i<=5; i++)
		{
			document.getElementById('material_keywords_'+i).checked = '';
		}
	}
}


function form_submit()
{
	document.forms[0].submit();
}

function getScrollClick(id)
{
	var topEle = $(id).getElementsByClassName('arrow_top');
	var bottomEle = $(id).getElementsByClassName('arrow_bottom');
	var sliderBg = $(id).getElementsByClassName('slider');
	
	topEle[0].style.background = 'transparent url(../_images/arrow_top_click.gif) no-repeat';
	bottomEle[0].style.background = 'transparent url(../_images/arrow_bottom_click.gif) no-repeat';
	sliderBg[0].style.background = '#bfbfbf';
}

function getScrollNoClick(id)
{
	var topEle = $(id).getElementsByClassName('arrow_top');
	var bottomEle = $(id).getElementsByClassName('arrow_bottom');
	var sliderBg = $(id).getElementsByClassName('slider');
	
	topEle[0].style.background = 'transparent url(../_images/scroll_arrow_top.gif) no-repeat';
	bottomEle[0].style.background = 'transparent url(../_images/scroll_arrow_bottom.gif) no-repeat';
	sliderBg[0].style.background = '#929292';
}


function getScrollOriginal(scrollbar,news_content,scroll_content_bar)
{
	if(document.getElementById(scrollbar).offsetHeight > 384)
	{
		scroller  = new jsScroller(document.getElementById(news_content), 400, 380);
		scrollbar = new jsScrollbar (document.getElementById(scroll_content_bar), scroller, true);
		scrollbar._scrollDist = 10;
	}
	else
	{
		document.getElementById(scroll_content_bar).style.visibility = 'hidden';
	}
}