function highlight(layerName) {
if (selTab != layerName )
      document.getElementById(layerName).className = 'optDisHoverTab' ;
}
function unhighlightsel(layerName) {
document.getElementById(layerName).className = 'optSelTab' ;
}

function selectTab(layerName) {
document.getElementById(layerName).className = 'optSelTab' ;
}

function gotopage (pagename) {
var strHref = window.location.href; 
if (strHref.indexOf("alpha2") > -1 ) {
    document.location="/alpha2"+pagename;
    return;
 } 
 document.location="/alpha"+pagename;
}

function unhighlight(layerName) {
if (selTab != layerName )
     document.getElementById(layerName).className = 'optDisTab' ;
else
     document.getElementById(layerName).className = 'optSelTab' ;
}

function getQueryParameterValue(strParamName ){
	  var strReturn = "";
	  var strHref = window.location.href;
	  strHref= strHref.replace("?","&");
	  if ( strHref.indexOf("&") > -1 ){
	    var strQueryString = strHref.substr(strHref.indexOf("&"));
	    var aQueryString = strQueryString.split("&");
	    for ( var iParam = 0; iParam < aQueryString.length; iParam++ ){
	      if (
	aQueryString[iParam].indexOf(strParamName + "=") > -1 ){
	        var aParam = aQueryString[iParam].split("=");
	        strReturn = aParam[1];
	        break;
	      }
	    }
	  }
	  return strReturn;
	}


function getCookie(c_name)
{
if (document.cookie.length>0)
  {
  c_start=document.cookie.indexOf(c_name + "=")
  if (c_start!=-1)
    { 
    c_start=c_start + c_name.length+1 
    c_end=document.cookie.indexOf(";",c_start)
    if (c_end==-1) c_end=document.cookie.length
    return unescape(document.cookie.substring(c_start,c_end))
    } 
  }
return ""
}

function checkLogin()
{
username=getCookie('uname')
if (username!=null && username!="")
  {  
     
     var style2 = document.getElementById("loginButton").style;
	style2.display = "none";
  }
else 
  {
     var style2 = document.getElementById("logoutButton").style;
	style2.display = "none";

  }
}