/**
 * @author michaelr
 */
	var currentImage=2;
	var currentTimeout;
	currentTimeout=setTimeout('transitionImage('+currentImage+')',2000);
	function transitionImage(currentImage) {
      	document.getElementById('starterBlock').style.display='none';
		if (currentImage==1) {
			blendimage('adBlock','adBlockImage','images/dcBlockAd.jpg',200);
			document.getElementById('adBlockLink').href='divorcecare.php';
			document.getElementById('adBlockLink').target="";
			currentImage=2;
			clearTimeout(currentTimeout);
			currentTimeout=setTimeout('transitionImage('+currentImage+')',10000);
		} else if (currentImage==2) {
			blendimage('adBlock','adBlockImage','images/awanaBlockAd.jpg',200);
			document.getElementById('adBlockLink').href='youth_children.php';
			document.getElementById('adBlockLink').target="";
			currentImage=3;
			clearTimeout(currentTimeout);
			currentTimeout=setTimeout('transitionImage('+currentImage+')',10000);
		} else if (currentImage==3) {
			blendimage('adBlock','adBlockImage','images/focusBlockAd.jpg',200);
			document.getElementById('adBlockLink').href='javascript:;';
			document.getElementById('adBlockLink').target="";
			currentImage=0;
			clearTimeout(currentTimeout);
			currentTimeout=setTimeout('transitionImage('+currentImage+')',10000);
		} else if (currentImage==0) {
			blendimage('adBlock','adBlockImage','images/blogBlockAd.jpg',200);
			document.getElementById('adBlockLink').href='http://revroten.blogspot.com';
			document.getElementById('adBlockLink').target="_blank";
			currentImage=1;
			clearTimeout(currentTimeout);
			currentTimeout=setTimeout('transitionImage('+currentImage+')',10000);
		}
	}

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) {
	//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);
	}
}

function blendimage(divid, imageid, imagefile, millisec) {
	var speed = Math.round(millisec / 100);
	var timer = 0;
	
	//set the current image as background
	document.getElementById(divid).style.backgroundImage = "url(" + document.getElementById(imageid).src + ")";
	
	//make image transparent
	changeOpac(0, imageid);
	
	//make new image
	document.getElementById(imageid).src = imagefile;

	//fade in image
	for(i = 0; i <= 100; i++) {
		setTimeout("changeOpac(" + i + ",'" + imageid + "')",(timer * speed));
		timer++;
	}
}

function currentOpac(id, opacEnd, millisec) {
	//standard opacity is 100
	var currentOpac = 100;
	
	//if the element has an opacity set, get it
	if(document.getElementById(id).style.opacity < 100) {
		currentOpac = document.getElementById(id).style.opacity * 100;
	}

	//call for the function that changes the opacity
	opacity(id, currentOpac, opacEnd, millisec)
}