function main(){

if (document.getElementById("mainContent").offsetHeight > document.getElementById("mainRightRight").offsetHeight)
{
document.getElementById("mainRightRight").style.height = document.getElementById("mainContent").offsetHeight + "px";
document.getElementById("mainNavi").style.height = document.getElementById("mainContent").offsetHeight + 1 + "px";
}
else if (document.getElementById("mainRightRight").offsetHeight > document.getElementById("mainContent").offsetHeight)
{
document.getElementById("mainContent").style.height = document.getElementById("mainRightRight").offsetHeight + "px";
document.getElementById("mainNavi").style.height = document.getElementById("mainRightRight").offsetHeight + "px";
}
}