function setCookie(name,value,days) {
    if (days) {
        var date = new Date();
        date.setTime(date.getTime()+(days*24*60*60*1000));
        var expires = "; expires="+date.toGMTString();
    }
    else var expires = "";
    document.cookie = name+"="+value+expires+"; path=/";
}

function getCookie(name) {
    var nameEQ = name + "=";
    var ca = document.cookie.split(';');
    for(var i=0;i < ca.length;i++) {
        var c = ca[i];
        while (c.charAt(0)==' ') c = c.substring(1,c.length);
        if (c.indexOf(nameEQ) == 0) return c.substring(nameEQ.length,c.length);
    }
    return null;
}

function deleteCookie(name) {
    setCookie(name,"",-1);
}
/*
  Changed function names from readCookie(), createCookie()
  and eraseCookie() to getCookie(), setCookie() and
  deleteCookie().
*/

function matchscreen(imgurl,imgwidth,imgheight,screenwidth,screenheight){
    //alert('imgwidth is :'+imgwidth+' en imgheight is :'+imgheight);
    var screen = 0;
    var img = 0;
     if ((screenwidth/16) == (screenheight/9)){
         screen = 1;
     } else if((screenwidth/16) == (screenheight/10)){
         screen = 1
     } else if ((screenwidth/4) == (screenheight/3)){
         screen = 2;
     }
     if ((imgwidth/16) == (imgheight/9)){
         img = 1;
     } else if((imgwidth/16) == (imgheight/10)){
         img = 1
     } else if ((imgwidth/4) == (imgheight/3)){
         img = 2;
     }
     //alert('img is :'+img+' en screen is :'+screen);
     /*if (screen ==0){return false;}else if (img == 0){return false;}else*/
     if (img == screen){

         return true;
     }else return false;
}