// Javascript Document

<!--//

function toggleDisplay(e)
{
	el = document.getElementById(e);
	if ( el.style.display == 'block' )
	{
		el.style.display = 'none';
	}
	else
	{
		el.style.display = 'block';
	}
}

//rotate images//
var pos = 1;
var logo = new Array;
var arraySize = 3
logo[0] = "images/evo1.jpg";
logo[1] = "images/evo2.jpg";
logo[2] = "images/evo3.jpg";
logo[3] = "images/evo4.jpg";


function rotateLogos()
{
	clearTimeout();
	opacity('client_logo', 100, 0, 1000);
	clearTimeout();
	setTimeout("swapImage()", 1000);
	clearTimeout();
	setTimeout("opacity('client_logo', 0, 100, 1000)", 3000);
	clearTimeout();
	setTimeout("rotateLogos()", 6000);
}

function swapImage()
{
	if (pos == arraySize + 1)
	{
		pos = 0
	}
	document.getElementById('client_logo').src = logo[pos];
	pos++;
}

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 + ")";
} 


//-->