asp.net 从cs类文件给js传值，js javascript获得后台传来的方法值或变量值

传变量值：

html js中 

var srcUrl = <%=getUrl%>;

var srcUrl = <%=getUrl%>;

cs类文件中

public static string getUrl = "http://www.hao123.com/logo.gif";

public static string getUrl = "http://www.hao123.com/logo.gif";

传方法值：

html js中 

var srcUrl = <%=getUrl()%>;

var srcUrl = <%=getUrl()%>;

cs类文件中

public static string getUrl()
{
        return  "http://www.hao123.com/logo.gif";
}