function set(objImage, strParam){
	objTable = document.getElementById('tbl' + strParam)
	objImage = objImage
	if(objTable.style.display == "none"){
		objTable.style.display = "block";
		objImage.src="imagen/admin/minus.gif"
	}else{
		objTable.style.display ="none";
		objImage.src="imagen/admin/plus.gif"
  }
}