function getPageScroll(){

	var yScroll;

	if (self.pageYOffset) {
		yScroll = self.pageYOffset;
	} else if (document.documentElement && document.documentElement.scrollTop){	 // Explorer 6 Strict
		yScroll = document.documentElement.scrollTop;
	} else if (document.body) {// all other Explorers
		yScroll = document.body.scrollTop;
	}

	arrayPageScroll = new Array('',yScroll) 
	return arrayPageScroll;
}

function getPageSize(){
	
	var xScroll, yScroll;
	
	if (window.innerHeight && window.scrollMaxY) {	
		xScroll = document.body.scrollWidth;
		yScroll = window.innerHeight + window.scrollMaxY;
	} else if (document.body.scrollHeight > document.body.offsetHeight){ // all but Explorer Mac
		xScroll = document.body.scrollWidth;
		yScroll = document.body.scrollHeight;
	} else { // Explorer Mac...would also work in Explorer 6 Strict, Mozilla and Safari
		xScroll = document.body.offsetWidth;
		yScroll = document.body.offsetHeight;
	}
	
	var windowWidth, windowHeight;
	if (self.innerHeight) {	// all except Explorer
		windowWidth = self.innerWidth;
		windowHeight = self.innerHeight;
	} else if (document.documentElement && document.documentElement.clientHeight) { // Explorer 6 Strict Mode
		windowWidth = document.documentElement.clientWidth;
		windowHeight = document.documentElement.clientHeight;
	} else if (document.body) { // other Explorers
		windowWidth = document.body.clientWidth;
		windowHeight = document.body.clientHeight;
	}	
	
	// for small pages with total height less then height of the viewport
	if(yScroll < windowHeight){
		pageHeight = windowHeight;
	} else { 
		pageHeight = yScroll;
	}

	// for small pages with total width less then width of the viewport
	if(xScroll < windowWidth){	
		pageWidth = windowWidth;
	} else {
		pageWidth = xScroll;
	}


	arrayPageSize = new Array(pageWidth,pageHeight,windowWidth,windowHeight) 
	return arrayPageSize;
}

function load_form(){
var obj =  document.getElementById('form_add');
var xp = 0; 
var yp = 0;

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

 obj.style.top =  arrayPageScroll[1] + ((arrayPageSize[3] - 35 - 222) / 2) + 'px';
 obj.style.left = ((arrayPageSize[0] - 20 - 330) / 2) + 'px';
}


var movetimer;
var menu_time = 1000;
var menu_start = 300;
var menu_offset = 0;

function start_form()
{
 var arrayPageSize = getPageSize();
 var arrayPageScroll = getPageScroll();
 if (navigator.appName=='Netscape' || navigator.appName=='Opera')
 {
 	menu_start = arrayPageScroll[1] + ((arrayPageSize[3] -1 - 222) / 2);
 	menu_offset = ((arrayPageSize[3] -1 - 222) / 2);
 	return;
 }
 
 menu_start = arrayPageScroll[1] + ((arrayPageSize[3] - 1 - 222) / 2);
 menu_offset = ((arrayPageSize[3] - 1 - 222) / 2);
 return;
}

function move_form()
{
 var element = document.getElementById('form_add'); // <===
 var top = parseInt(element.style.top);
 if (isNaN(top)) top = menu_start;
 var to = parseInt(document.body.scrollTop);
 to = (isNaN(to) ? 0 : to) + menu_offset;
 if (to < menu_start) to = menu_start;
 if (top != to)
 {
  var d = Math.ceil(Math.abs(to - top) / 15);
  top += (to > top ? d : -d);
  top = top.toFixed(0);

  element.style.top = top;
  menu_time = 10;
 } else menu_time = 300;
 movetimer = setTimeout("move_form()", menu_time);
}