var home1img = new Image();
var home2img = new Image();
var home3img = new Image();
var home4img = new Image();
var home5img = new Image();
home1img.src = "http://www.woodysprops.com/img/home1.jpg";
home2img.src = "http://www.woodysprops.com/img/home2.jpg";
home3img.src = "http://www.woodysprops.com/img/home3.jpg";
home4img.src = "http://www.woodysprops.com/img/home4.jpg";
home5img.src = "http://www.woodysprops.com/img/home5.jpg";


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)
}

function blend(idx) {
    var rbg = document.getElementById("rotatebg");
    var rfg = document.getElementById("rotate");
    
    rbg.style.backgroundImage = "url('" + rfg.src + "')";
    
    setTimeout("blend2(" + idx + ")", 1000);    
}

function blend2(idx) {
    var speed = 2;
    var timer = 0;
    var rbg = document.getElementById("rotatebg");
    var rfg = document.getElementById("rotate");
    
    changeOpac(0, "rotate");
    
    if (idx > 5) {
        idx = 1;
    }
    
    if (idx === 1) {
        rfg.src = home1img.src;
    }
    else if (idx === 2) {
        rfg.src = home2img.src;
    }
    else if (idx === 3) {
        rfg.src = home3img.src;
    }
    else if (idx === 4) {
        rfg.src = home4img.src;
    }
    else if (idx === 5) {
        rfg.src = home5img.src;
    }
    
    for (var i = 1; i <= 100; i++) {
        setTimeout("changeOpac(" + i + ",'rotate')", (timer * speed));
        timer++;
    }
    
    idx++;
    
    setTimeout("blend(" + idx + ")", 4000);
}