function handleResize(){

	var winWidth = 800;
	var winHeight = 600;

	if (navigator.appName.indexOf("Microsoft")!=-1) {
  	winWidth = parseInt(document.body.offsetWidth);
		winHeight = parseInt(document.body.offsetHeight);
	}
	else{
		winWidth = parseInt(window.innerWidth);
		winHeight = parseInt(window.innerHeight);
	}


	try {
		var objHideBack = document.getElementById(objHideBackId);
	}

	catch(err){
		objHideBack = false;
	}


	if (objHideBack != false && winWidth >= 800){

	  var objHideBack = document.getElementById(objHideBackId);

		var menuWidth = 185;
		var left = parseInt(objHideBack.style.left);
		var width = parseInt(objHideBack.style.width);
		
		left = Math.round( (winWidth - width)/2 );
		objHideBack.style.left = left + "px";

              					
	}


	if(objHideBack != false && winHeight >= 600){

	  var objHideBack = document.getElementById(objHideBackId);
		var top = parseInt(objHideBack.style.left);
		var height = parseInt(objHideBack.offsetHeight);

    height = Math.round( (winHeight - height)/2 );
		objHideBack.style.top = height + "px";

	}	
}