var str = navigator.appName;
if (str.match('Internet Explorer') == 'Internet Explorer')
{
var screenWidth = screen.availwidth;
var contentHeight=document.body.offsetHeight;
}
else if(1==0)
{
var screenWidth = screen.availwidth;
var contentHeight=document.getElementById('centre').offsetHeight;
contentHeight = contentHeight-126;
contentHeight = contentHeight-15;
}
else
{
var screenWidth = self.innerWidth;
var contentHeight = this.innerHeight;
document.getElementById('page').focus();
}

centre.style.height=contentHeight;
page.style.height=contentHeight-15-150;