function getPageSize() {
	        
	     var xScroll, yScroll;
		
		if (window.innerHeight && window.scrollMaxY) {	
			xScroll = window.innerWidth + window.scrollMaxX;
			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
			if(document.documentElement.clientWidth){
				windowWidth = document.documentElement.clientWidth; 
			} else {
				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 = xScroll;		
		} else {
			pageWidth = windowWidth;
		}

		return {width: pageWidth, height: pageHeight};
	}
	
        function showHide()
        {
            if(typeof Page_ClientValidate == 'function') 
            { 
                Page_ClientValidate(); 
            
                if(Page_IsValid)
                {
                    toggleDiv('tpf2009_loading_background'); 
                    toggleDiv('tpf2009_loading_image');
                }
            }
        }
        
function toggleDiv(element){

       
       var pageSize = getPageSize();

      if(document.getElementById(element).style.display = 'none')
      {
        document.getElementById(element).style.display = 'block';
        document.getElementById(element).style.height = pageSize.height + 'px';
      }
      else if(document.getElementById(element).style.display = 'block')
      {
        document.getElementById(element).style.display = 'none';
      }
}