function showIbox(iboxid) {
 var ibox = document.getElementById(iboxid);
 var bwidth = 400;
 var bheight = 300;

 var arrayPageSize = getPageSize();
 var arrayPageScroll = getPageScroll();

 ibox.style.top = arrayPageScroll[1] + ((arrayPageSize[3] - bheight) / 2) + 'px';
 ibox.style.left = ((arrayPageSize[0] - bwidth) / 2) + "px";
 ibox.style.width = bwidth + "px";
 ibox.style.height = bheight + "px";
 // alert('wwidth='+wwidth+'; bwidth='+bwidth+'; wheight='+wheight+'; bheight='+bheight);
 ibox.zIndex = '0';
 ibox.style.display = 'block';
 return false;
}
function HideIbox(iboxid) {
 var ibox = document.getElementById(iboxid);
 ibox.zIndex = '1000';
 ibox.style.display = 'none';
}