function navonmouse(obj,isover,objvalue){
	if (isover=="over"){
		MM_findObj('l_'+obj).src='/images/nav_over_left.gif';MM_findObj('r_'+obj).src='/images/nav_over_right.gif';MM_findObj('n_'+obj).className='nav_over';
	}else{
		MM_findObj('l_'+obj).src='/images/nav_off_left.gif';MM_findObj('r_'+obj).src='/images/nav_off_right.gif';MM_findObj('n_'+obj).className='nav_off';
	}
}

//创建Http对象
function CreateAjaxObject(){
	if (window.XMLHttpRequest){
	req = new XMLHttpRequest();
	}
	else if (window.ActiveXObject){
		req = new ActiveXObject("Microsoft.XMLHTTP");
	}
}
function subnav_show(sltvle){
	CreateAjaxObject();
	req.onreadystatechange = function(){processcheck("subnav_show","")};
	req.open( "get", encodeURI("/ajax_linkcate.htm?action=link_cate_sub&cate_id="+sltvle+"&timer="+Math.random()), false );
	req.send();
}

function link_cate_change(selectvalue,targetdiv){
	CreateAjaxObject();
	req.onreadystatechange = function(){processcheck(targetdiv,"")};
	req.open( "get", encodeURI("ajax_linkcate.htm?action=link_cate&cate_id="+selectvalue+"&timer="+Math.random()), false );
	req.send();
}