function changTag(obj){
    //*************************************
    if(obj.id == "Tag1"){
        document.getElementById('detail_content').style.display = "block";
        document.getElementById('pro_message').style.display = "none";
        document.getElementById('type_1').src="images/Commodities_30.gif";
        document.getElementById('type_2').src="images/Commodities_31.gif";
    }else if(obj.id == "Tag2"){
        document.getElementById('detail_content').style.display = "none";
        document.getElementById('pro_message').style.display = "block";
        document.getElementById('type_1').src="images/Commoditiesd.gif";
        document.getElementById('type_2').src="images/Commoditiesr.gif";
	
    }
    //*************************************
}