//声明一个当前页面地址查找函数
function flagurl(){
	//取得当前页面的网址
	var netURL=location.href;
	//查找是否含有sohu
	var n=netURL.indexOf("sohu", 0)
	return n;

	}


function write_top(){
	        var flag=flagurl();
	
		if(flag>0){
		document.write("<iframe src='/public/infor/sohu_top.htm' width='100%' height='22' frameborder='0' scrolling='no'></iframe>");
		
		}
	
	}

function write_bottom(){
	        var flag=flagurl();
	
		if(flag>0){
		document.write("<iframe src='/public/infor/sohu_bottom.htm' width='100%' height='50' frameborder='0' scrolling='no'></iframe>");
		
	}
	
	
	}

write_top();