/*
var w3c=(document.getElementById)? true: false;
var ie=(w3c && document.all)? true : false
*/

function ShowMe(ThisLayer) 
{ 
	// expand
	if (document.getElementById(ThisLayer))
	{
		document.getElementById(ThisLayer).style.display = 'block';
	}
}

function HideMe(ThisLayer)
{
	if (document.getElementById(ThisLayer))
	{
	document.getElementById(ThisLayer).style.display = 'none';
	}
	return;
}


function SwitchClass(ThisLayer,ThisClass)
{
	//alert(ThisLayer + ' -> ' + ThisClass)
	if (document.getElementById(ThisLayer))
	{
	document.getElementById(ThisLayer).className = ThisClass;
	}
	return;
}



function Visible(ThisLayer) 
{ 
	// expand
	if (document.getElementById(ThisLayer))
	{
		document.getElementById(ThisLayer).style.visibility = 'visible';
	}
}
function Invisible(ThisLayer)
{
	//collapse: When used in table elements, this value removes a row or column
	// If this value is used on other elements, it renders as "hidden"
	//alert('ie known issue')
	if (document.getElementById(ThisLayer))
	{
	document.getElementById(ThisLayer).style.visibility = 'collapse';
	}
	return;
}



function opacity(id, opacStart, opacEnd, millisec) {
    //speed for each frame
    var speed = Math.round(millisec / 100);
    var timer = 0;

    //determine the direction for the blending, if start and end are the same nothing happens
    if(opacStart > opacEnd) {
        for(i = opacStart; i >= opacEnd; i--) {
            setTimeout("changeOpac(" + i + ",'" + id + "')",(timer * speed));
            timer++;
        }
    } else if(opacStart < opacEnd) {
        for(i = opacStart; i <= opacEnd; i++)
            {
            setTimeout("changeOpac(" + i + ",'" + id + "')",(timer * speed));
            timer++;
        }
    }
}

//change the opacity for different browsers
function changeOpac(opacity, id)
{
    var object = document.getElementById(id).style;
    object.opacity = (opacity / 100);
    object.MozOpacity = (opacity / 100);
    object.KhtmlOpacity = (opacity / 100);
    object.filter = "alpha(opacity=" + opacity + ")";
}


function ShiftOpacity(id, millisec) 
	{
	//alert(id)
    //if an element is invisible, make it visible, else make it ivisible
    if(document.getElementById(id).style.opacity == 0) 
		{
        opacity(id, 0, 100, millisec);
		} 
		else 
		{
        opacity(id, 100, 0, millisec);
		}
}