function PageHeight(headerHeight, footerHeight) {

    var Others_H = 97;  // Iframen, linkkipalkin ja alakuvan korkeus;
    var Header_H = document.getElementById(headerHeight).offsetHeight;
    var Footer_H = document.getElementById(footerHeight).offsetHeight;
    var Body_H = document.getElementById("id_body").offsetHeight;
    document.getElementById("id_PageContent").style.height = (Body_H - (Footer_H + Header_H + Others_H) +'px') ;
    // alert(Header_H);
}