var images_brainwave = new Array();
images_brainwave[0]="up";
images_brainwave[1]="brainwave_whyandhowdev";
images_brainwave[2]="brainwave_howitworks";
images_brainwave[3]="brainwave_results";

images_brainwave[4]="up_hover";
images_brainwave[5]="brainwave_whyandhowdev_hover";
images_brainwave[6]="brainwave_howitworks_hover";
images_brainwave[7]="brainwave_results_hover";

document.write("<div style='display:none;'>");
for(i=0; i<images_brainwave.length; i++) 
{
	
	document.write("<img src='images_navbtn/" + images_brainwave[i] + ".gif' id='" + images_brainwave[i] + "_o'>");
}
document.write("</div>");

function get(id)
{
	return document.getElementById(id);
}

function over(id)
{
	imgsid=id.replace("_hover","");
	get(imgsid).src = get(id+"_o").src;
	//alert(get(id).src)
}

function out(id)
{
	//alert(id + " - " + get(id+"_o"))
	get(id).src = get(id+"_o").src;
}

function on(id)
{
	get(id).src = ""+id+"_on";
}