function openWindow(mypage, myname, w, h, scroll) 
		{
			var winl = (screen.width - w) / 2;
			var wint = (screen.height - h) / 2;
			winprops = 'height='+h+',width='+w+',top='+wint+',left='+winl+',scrollbars='+scroll+',resizable'
			gmtWindow = window.open(mypage, myname, winprops)
			if (parseInt(navigator.appVersion) >= 4) { gmtWindow.window.focus(); }
		}

		function toggle_hiding(what) {
		      var tmp = document.getElementById(what);
		      if (tmp.style.display == 'none') {
		        tmp.style.display = 'block';
		      } else {
		        tmp.style.display = 'none';
		      }
		}
		
		function hide(what) {
		      var tmp = document.getElementById(what);
		      if (tmp.style.display != 'none') {
		        tmp.style.display = 'none';
		      }
		}
		function show(what) {
		      var tmp = document.getElementById(what);
		      if (tmp.style.display == 'none') {
		        tmp.style.display = 'block';
		      } 
		}
		
		function Get_Cookie( check_name ) {
			// first we'll split this cookie up into name/value pairs
			// note: document.cookie only returns name=value, not the other components
			var a_all_cookies = document.cookie.split( ';' );
			var a_temp_cookie = '';
			var cookie_name = '';
			var cookie_value = '';
			var b_cookie_found = false; // set boolean t/f default f
			
			for ( i = 0; i < a_all_cookies.length; i++ )
			{
				// now we'll split apart each name=value pair
				a_temp_cookie = a_all_cookies[i].split( '=' );
				
				
				// and trim left/right whitespace while we're at it
				cookie_name = a_temp_cookie[0].replace(/^\s+|\s+$/g, '');
			
				// if the extracted name matches passed check_name
				if ( cookie_name == check_name )
				{
					b_cookie_found = true;
					// we need to handle case where cookie has no value but exists (no = sign, that is):
					if ( a_temp_cookie.length > 1 )
					{
						cookie_value = unescape( a_temp_cookie[1].replace(/^\s+|\s+$/g, '') );
					}
					// note that in cases where cookie is initialized but no value, null is returned
					return cookie_value;
					break;
				}
				a_temp_cookie = null;
				cookie_name = '';
			}
			if ( !b_cookie_found )
			{
				return null;
			}
		}