function browser_get_height() {
	var viewportwidth;
	 var viewportheight;
	 
	 // the more standards compliant browsers (mozilla/netscape/opera/IE7) use window.innerWidth and window.innerHeight
	 
	 if (typeof window.innerWidth != 'undefined')
	 {
		  viewportwidth = window.innerWidth,
		  viewportheight = window.innerHeight
	 }
	 
	// IE6 in standards compliant mode (i.e. with a valid doctype as the first line in the document)
	
	 else if (typeof document.documentElement != 'undefined'
		 && typeof document.documentElement.clientWidth !=
		 'undefined' && document.documentElement.clientWidth != 0)
	 {
		   viewportwidth = document.documentElement.clientWidth,
		   viewportheight = document.documentElement.clientHeight
	 }
	 
	 // older versions of IE
	 
	 else
	 {
		   viewportwidth = document.getElementsByTagName('body')[0].clientWidth,
		   viewportheight = document.getElementsByTagName('body')[0].clientHeight
	 }
	 return viewportheight;
}

function browser_get_width() {
	var viewportwidth;
	 var viewportheight;
	 
	 // the more standards compliant browsers (mozilla/netscape/opera/IE7) use window.innerWidth and window.innerHeight
	 
	 if (typeof window.innerWidth != 'undefined')
	 {
		  viewportwidth = window.innerWidth,
		  viewportheight = window.innerHeight
	 }
	 
	// IE6 in standards compliant mode (i.e. with a valid doctype as the first line in the document)
	
	 else if (typeof document.documentElement != 'undefined'
		 && typeof document.documentElement.clientWidth !=
		 'undefined' && document.documentElement.clientWidth != 0)
	 {
		   viewportwidth = document.documentElement.clientWidth,
		   viewportheight = document.documentElement.clientHeight
	 }
	 
	 // older versions of IE
	 
	 else
	 {
		   viewportwidth = document.getElementsByTagName('body')[0].clientWidth,
		   viewportheight = document.getElementsByTagName('body')[0].clientHeight
	 }
	 return viewportwidth;
}


function init_pos_site_height(id) {

	var viewportheight = browser_get_height();
	var height = viewportheight;
	var header_height = 280;
	var bodyElement = document.getElementById(id);
	
	alert(bodyElement.innerHTML);
	
	bodyElement.style.overflow = "auto";
	bodyElement.style.height = (height-header_height)+"px";
	
	alert("ok");
}

function pos_site_height(id) {
	var bodyElement = document.getElementById(id);
	var viewportheight = browser_get_height();
	
	var start_y = "0px";
	
	if(bodyElement) bodyElement.style.left = start_x;
}


var viewportheight = browser_get_height();
document.observe("dom:loaded", function() {
  	var viewportheight = browser_get_height();
	var height = viewportheight;
	var header_height = 280;
	var bodyElement = document.getElementById("scroll_wrapper");

	bodyElement.style.height = (height-header_height-3)+"px";
	bodyElement.style.zIndex = "1000";

});