function changePhoto(id)
{
	this.el1 = $("main_photo1");
	this.el2 = $("main_photo2");
	this.el3 = $("main_photo3");
	this.el4 = $("main_photo4");
	
	this.el = $("main_photo" + id);
	
	this.el1.style.display = "none";
	this.el2.style.display = "none";
	this.el3.style.display = "none";
	this.el4.style.display = "none";
	
	this.el.style.display = "block";
};