var gtype=".gif";
var overstate="_over";
var offstate="_off";
reg("pp_b1");
reg("pp_b2");
reg("pp_b3");
reg("pp_b4");
reg("pp_b5");
reg("pp_b6");
reg("pp_b7");
reg("pp_b8");
function turn_over(name) {
	if (document.images != null) {
		document[name].src = document[name+overstate].src;
	}
}
function turn_off(name) {
	if (document.images != null) {
		document[name].src = document[name+offstate].src;
	}
}
function reg(name){
	if (document.images){
		document[name+offstate] = new Image();
		document[name+offstate].src = "/es/int/"+name+gtype;
		document[name+overstate] = new Image();
		document[name+overstate].src = "/es/int/"+name+overstate+gtype;
	}
}