ASP. NET code to the foreground to set the CSS style, drop-down list in JS value

Background to hide or show the foreground div tag according to different user login

Front desk:

    runat= "Server">....</div>

Background
     Hidden:  this.div1.Style.Add ("Display", "none");  

     Display:  this.div1.Style.Add ("Display", "block");

  You must add  runat= "Server"

Drop- down list Change event to get the changed value

var options=$ ("#test option:selected"); Gets the selected item

Alert (Options.val ()); Get the value of the selected item

Alert (Options.text ()); Get the text of the selected item

ASP. NET code to the foreground to set the CSS style, drop-down list in JS value