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 getOffsets (evt) {
  var target = evt.target;
  if (typeof target.offsetLeft == 'undefined') {
	target = target.parentNode;
  }
  var pageCoords = getPageCoords(target);
  var eventCoords = { 
	x: window.pageXOffset + evt.clientX,
	y: window.pageYOffset + evt.clientY
  };
  var offsets = {
	offsetX: eventCoords.x - pageCoords.x,
	offsetY: eventCoords.y - pageCoords.y
  }
  return offsets;
}
function getPageCoords (element) {
  var coords = {x : 0, y : 0};
  while (element) {
	coords.x += element.offsetLeft;
	coords.y += element.offsetTop;
	element = element.offsetParent;
  }
  return coords;
}
function doLinks (evt, contentType) {
  xPos = evt.offsetX;
  yPos = evt.offsetY;
  if (typeof evt.offsetX == 'undefined') {
	var evtOffsets = getOffsets(evt);
	xPos = evtOffsets.offsetX;
	yPos = evtOffsets.offsetY;
  }
  //alert(contentType + ", X: " + xPos + ", Y: " + yPos);
  switch(contentType) {
	case 'services-off-img':
		if (yPos < 62) {
			document.location = '/services/accounting-services.php';
		} else if (yPos < 86) {
			document.location = '/services/auditing-attestation.php';
		} else if (yPos < 110) {
			document.location = '/services/business-valuation.php';
		} else if (yPos < 134) {
			document.location = '/services/employee-benefit-plans.php';
		} else if (yPos < 158) {
			document.location = '/services/forensic-accounting.php';
		} else if (yPos < 182) {
			document.location = '/services/litigation-support.php';
		} else if (yPos < 206) {
			document.location = '/services/management-consulting.php';
		} else {
			document.location = '/services/tax-services.php';
		}
		break;
	case 'industries-off-img':
		if (yPos < 62) {
			document.location = '/industries/automotive.php';
		} else if (yPos < 86) {
			document.location = '/industries/banking.php';
		} else if (yPos < 110) {
			document.location = '/industries/construction.php';
		} else if (yPos < 134) {
			document.location = '/industries/healthcare.php';
		} else if (yPos < 158) {
			document.location = '/industries/manufacturing.php';
		} else if (yPos < 182) {
			document.location = '/industries/nonprofit.php';
		} else if (yPos < 206) {
			document.location = '/industries/professional-service.php';
		} else if (yPos < 230) {
			document.location = '/industries/public-companies.php';
		} else {
			document.location = '/industries/retail-wholesale.php';
		}
		break;
	case 'careers-off-img':
		if (yPos < 62) {
			document.location = '/careers/';
		} else if (yPos < 86) {
			document.location = '/careers/faq.php';
		} else if (yPos < 110) {
			document.location = '/careers/job-descriptions.php';
		} else if (yPos < 134) {
			document.location = '/careers/campus-recruiting.php';
		} else if (yPos < 158) {
			document.location = '/careers/employment-inquiries.php';
		} else {
			document.location = '/careers/';
		}
		break;
	default:
		document.location = '/services/accounting-services.php';
  }
}