function setBG()
{
    var iMin = 500;

    var oL = (document.all)? document.all.navi_holder 	: document.getElementById("navi_holder");
    var oC = (document.all)? document.all.content_wrap  : document.getElementById("content_wrap");
    var oR = (document.all)? document.all.right_content : document.getElementById("right_content");



    var iMax = Math.max(iMin, oL.offsetHeight, oC.offsetHeight, oR.offsetHeight);

    if (oC.offsetHeight <= iMax) {
		//oC.style.height =  (iMax / 16) + "em";
    }

    if (oL.offsetHeight <= iMax) {
		oL.style.height =  (iMax / 11.2) + "em";
    }


    if (oR.offsetHeight <= iMax) {
		oR.style.height =  (iMax / 11.2) + "em";
    }


}