$(document).ready(function(){
  $("img.careers_button").mouseover(function(){
		var imgName = this.src;
		var imgRaw = imgName.substr(0,imgName.length-4);
		var imgExt = imgName.substr(imgName.length-4);
		var imgOn = imgRaw + "_over" + imgExt;
		this.src = imgOn;
		return imgOn;
	});
  $("img.careers_button").mouseout(function(){
		var imgName = this.src;
		var imgRaw = imgName.substr(0,imgName.length-9);
		var imgExt = imgName.substr(imgName.length-4);
		var imgOn = imgRaw + imgExt;
		this.src = imgOn;
		return imgOn;
	});
});

function preloadImgs(srcs){
  var imgs =  new Array();
  for(i=0; i<srcs.length; i++){
    imgs[i] = new Image();
    imgs[i].src = srcs[i];
  }
}