var expDays = 30;
var exp = new Date(); 
exp.setTime(exp.getTime() + (expDays*24*60*60*1000));
function getexpirydate( nodays)
{
	var UTCstring;
	Today = new Date();
	nomilli=Date.parse(Today);
	Today.setTime(nomilli+nodays*24*60*60*1000);
	UTCstring = Today.toUTCString();
	 return UTCstring;
}

/**
 * Sets a Cookie with the given name and value.
 *
 * name Name of the cookie
 * value Value of the cookie
 * [expires] Expiration date of the cookie (default: end of current session)
 * [path] Path where the cookie is valid (default: path of calling document)
 * [domain] Domain where the cookie is valid
 * (default: domain of calling document)
 * [secure] Boolean value indicating if the cookie transmission requires a
 * secure transmission
 */


function SetCookie (name, value) {  
	var argv = SetCookie.arguments;  
	var argc = SetCookie.arguments.length;  
	var expires = (argc > 2) ? argv[2] : null;  
	var path = (argc > 3) ? argv[3] : null;  
	var domain = (argc > 4) ? argv[4] : null;  
	var secure = (argc > 5) ? argv[5] : false;  
	document.cookie = name + "=" + escape (value) + 
	((expires == null) ? "; expires=Thu,31-Dec-2020 00:00:00 GMT;" : ("; expires=" + expires.toGMTString())) + 
	((path == null) ? "" : ("; path=" + path)) +  
	((domain == null) ? "" : ("; domain=" + domain)) +    
	((secure == true) ? "; secure" : "");
}

/**
 * Gets the value of the specified cookie.
 *
 * name Name of the desired cookie.
 *
 * Returns a string containing value of specified cookie,
 * or null if cookie does not exist.
 */
function getCookie(name) {
	 var dc = document.cookie;
	 var prefix = name + "=";
	 var begin = dc.indexOf("; " + prefix);
	 if (begin == -1) {
	 begin = dc.indexOf(prefix);
	 if (begin != 0) return null;
	 } else {
	 begin += 2;
	 }
	 var end = document.cookie.indexOf(";", begin);
	 if (end == -1) {
	 end = dc.length;
	 }
	 return unescape(dc.substring(begin + prefix.length, end));
}				
	
/**
 * Deletes the specified cookie.
 *
 * name name of the cookie
 * [path] path of the cookie (must be same as path used to create cookie)
 * [domain] domain of the cookie (must be same as domain used to create cookie)
 */
function deleteCookie(name, path, domain) {
	if (getCookie(name)) {
		document.cookie = name + "=" +
		((path) ? "; path=" + path : "") +
		((domain) ? "; domain=" + domain : "") +
		"; expires=Thu, 01-Jan-70 00:00:01 GMT";
	}
}