function toggle(item,title) {
var obj1=document.getElementById(item);

a1=document.getElementById("x"+item);
prop=a1.style.display;

if (prop=="none") {document.getElementById("x"+item).style.display="block"; obj1.innerHTML="[-]"+title} else
 
{document.getElementById("x"+item).style.display="none"; obj1.innerHTML="[+]" + title};
}



function display() 
{
imagenumber=20;
random1=Math.floor(Math.random()*imagenumber)+1;

document.write('<img src="images/headimage'+random1+'.jpg" width=800 height=250>');
}