var Picture = ["image1_b.jpg","image2_b.jpg","image3_b.jpg","image4_b.jpg","image5_b.jpg","image6_b.jpg"];

function d_AssignEvents(){
	var imageArray = document.getElementById("content").getElementsByTagName("img");
	for(x=0; x<imageArray.length;x++){
		imageArray[x].style.cursor = 'crosshair';
		imageArray[x].onmouseover = function(){d_ImageRollover(this);};
		imageArray[x].onmouseout = function(){d_ImageRollover(this);};
	}
}

function d_CreateImageArray(){
	var preLoad = new Array();
	for (x = 0; x < Picture.length; x++){
		preLoad[x] = new Image();
		preLoad[x].src = "Images/" + Picture[x];
	}
}


function d_ImageRollover(obj){
	var _src = obj.src;
	var _imageType = _src.substring(_src.length-4);
	var _imagePreName = _src.substring(0,_src.length-5);
	var _imageLetter = _src.substring(_src.length-5,_src.length-4);
	
	(_imageLetter == 'a')?obj.src = _imagePreName + 'b' + _imageType:obj.src = _imagePreName + 'a' + _imageType;
}

window.onload = function(){
	d_CreateImageArray();
	d_AssignEvents();
}