function setCookie(name,value)
{if(name!='')
document.cookie=name+'='+value;}
function getCookie(name)
{if(name=='')
return('');name_index=document.cookie.indexOf(name+'=');if(name_index==-1)
return('');cookie_value=document.cookie.substr(name_index+name.length+1,document.cookie.length);end_of_cookie=cookie_value.indexOf(';');if(end_of_cookie!=-1)
cookie_value=cookie_value.substr(0,end_of_cookie);space=cookie_value.indexOf('+');while(space!=-1)
{cookie_value=cookie_value.substr(0,space)+' '+
cookie_value.substr(space+1,cookie_value.length);space=cookie_value.indexOf('+');}
return(cookie_value);}
function clearCookie(name)
{expires=new Date();expires.setYear(expires.getYear()-1);document.cookie=name+'=null'+'; expires='+expires;}