var plusbutton = "/img/plus.gif";
var minusbutton = "/img/minus.gif";
function togglediv(divid){
	if(document.getElementById(divid).style.display == 'none'){
		document.getElementById(divid).style.display = 'block';
		eval("document.button_"+divid+".src=minusbutton");
	}
	else{
		document.getElementById(divid).style.display = 'none';
		eval("document.button_"+divid+".src=plusbutton");
	}
}