function readregister()
    {
	 alert(document.cookie);
        var cookiepair = document.cookie.split("=");
    if(cookiepair[0] != null
       && cookiepair[1] != null)
{
        var truevalue = "";
        var arraycode = cookiepair[1].split("+");
        for(var i = 0; i < arraycode.length; ++i)
            truevalue += String.fromCharCode(arraycode[i]);
        if(cookiepair != null)
        {        
        	alert(1);
           return truevalue;
        }
		else
		{
			return null;
		}
    }
    else
       return null;
}
function writecookie(cookiename,cookievalue)
{
	
       var codecookievalue = "";
     for(var i = 0;i < cookievalue.length; ++i)
     {
        codecookievalue += cookievalue.charCodeAt(i);
        if(i < cookievalue.length-1)
            codecookievalue += "+";
	 }       
     var cookie = cookiename + "=" + codecookievalue;
     var date = new Date();
     date.setTime(date.getTime() + 600000);
     var expirestr = date.toGMTString();
     cookie += "; expires=" + expirestr;
     document.cookie = cookie;
}