var caminhoPasta = "images/estrutura/bckgrounds_internas/"
	var extencao = ".JPG"
	var nFotos = "5"
	window.onload = function(){
		var Obj = document.getElementById("content");		
		var Rd = parseInt(Math.random() * 10);	
		//Obj.style.background = "url('images/estrutura/bckgrounds_internas/1.jpg')";	
		// + alinha + " " + rep		
		if(Rd <= (nFotos - 1))		
			Obj.style.backgroundImage = "url('" + caminhoPasta + Rd + extencao + "')";
		else
			Obj.style.backgroundImage = "url('" + caminhoPasta + parseInt(Rd/2) + extencao + "')";	

	}