function ShowFeedBackForm() {
	// get the div
	var obj = document.getElementById("FeedBackForm");
	var frame = document.getElementById("FeedBackFrame");

			// check if asp.net validator and validate the form
	if(typeof(Page_ClientValidate) == 'function') {
		var isValidPage = Page_ClientValidate();
		if(!isValidPage) {
					return;
		}
	}
		
			// if div found, show it in the center of the page.
	if(obj != null && frame != null) {
		scroll(0,0);
		obj.style.top = '50%';
		obj.style.left = '50%';
		
		frame.style.top = '50%';
		frame.style.left = '50%';
		frame.height = obj.getAttribute('offsetHeight');
		frame.width = obj.getAttribute('offsetWidth');
		
		frame.style.visibility = "";
		obj.style.visibility = "";
	}
}