function setCookie(name,value,hours,path){
    var name = escape(name);
    var value = escape(value);
    var expires = new Date();
     expires.setTime(expires.getTime() + hours*3600000);
     path = path == "" ? "" : ";path=" + path;
     _expires = (typeof hours) == "string" ? "" : ";expires=" + expires.toUTCString();
     document.cookie = name + "=" + value + _expires + path;
}

function getCookieValue(name){
    var name = escape(name);
    var allcookies = document.cookie;       
     name += "=";
    var pos = allcookies.indexOf(name);    
    if (pos != -1){                                             
        var start = pos + name.length;
        var end = allcookies.indexOf(";",start);        
        if (end == -1) end = allcookies.length;        
        var value = allcookies.substring(start,end); 
        return unescape(value);
         }   
    else return "";         
}

function deleteCookie(name,path){
    var name = escape(name);
    var expires = new Date(0);
     path = path == "" ? "" : ";path=" + path;
     document.cookie = name + "="+ ";expires=" + expires.toUTCString() + path;
}

function $(objStr){return document.getElementById(objStr);}
window.onload = function(){
    var usernameValue = getCookieValue("username_login");
     $("username_login").value = usernameValue;
    var passwordValue = getCookieValue("password_login");
     $("password_login").value = passwordValue;
     $("submit").onclick = function()
	{
		if( $("saveCookie_login").checked)
		{  
	        var usernameValue = $("username_login").value;
    	    var passwordValue = $("password_login").value;
        	setCookie("username_login",$("username_login").value,2400,"/");
        	setCookie("password_login",$("password_login").value,2400,"/");
		}
     }
}