function gohome(){
//	alert("parent="+window.parent.location);
    if(window.parent.location===window.location)
    window.parent.location='../index.html';
//    window.parent.getElementById('viewport').src=window.location;
}
function showcontent1(){
	document.getElementById('contentcolumn2').style.display="none";
	document.getElementById('contentcolumn').style.display="block";
	document.getElementById('rightcolumn').style.display="block";
}
function showcontent2(){
	document.getElementById('contentcolumn').style.display="none";
	document.getElementById('rightcolumn').style.display="none";
	document.getElementById('contentcolumn2').style.display="block";
}
function setCookie( name, value, expires, path, domain, secure )
{
// set time, it's in milliseconds
var today = new Date();
today.setTime( today.getTime() );

/*
if the expires variable is set, make the correct
expires time, the current script below will set
it for x number of days, to make it for hours,
delete * 24, for minutes, delete * 60 * 24
*/
if ( expires )
{
expires = expires * 1000 * 60 * 60 * 24;
}
var expires_date = new Date( today.getTime() + (expires) );

document.cookie = name + "=" +escape( value ) +
( ( expires ) ? ";expires=" + expires_date.toGMTString() : "" ) +
( ( path ) ? ";path=" + path : "" ) +
( ( domain ) ? ";domain=" + domain : "" ) +
( ( secure ) ? ";secure" : "" );
}

function getCookie(CookieName){
 	    var CookieVal = null;
	    if(document.cookie)	   //only if exists
	    {
       	    var arr = document.cookie.split((escape(CookieName) + '=')); 
       	    if(arr.length >= 2)
       	    {
           	    var arr2 = arr[1].split(';');
       		    CookieVal  = unescape(arr2[0]); //unescape() : Decodes the String
       	    }
	    }
	    return CookieVal;
    }
    // To delete a cookie, pass name of the cookie to be deleted

    function deleteCookie(CookieName)
    {
		document.cookie = CookieName + '=; expires=Thu, 01-Jan-70 00:00:01 GMT;';
	}