function updateHeight()
{
var intmainSubBannerBg = document.getElementById("mainSubBannerBg").offsetHeight; 
//document.getElementById("whiteVR").style.height = intmainSubBannerBg + "px";  
//alert(intmainSubBannerBg);
//alert(document.getElementById("whiteVR").offsetHeight);
document.getElementById("whiteVR").style.height = intmainSubBannerBg -15 +"px";
 }