function display_block(block_id, handle){

		var e = document.getElementById(block_id);
		var h = document.getElementById(handle);
		
		if(h.checked)
			e.style.display = 'block';
			else
			e.style.display = 'none';
			
	}
	
	function hide_block(block_id){

		var e = document.getElementById(block_id);

			e.style.display = 'none';
			
	}
	
	function WindowOnload(f) {
	    var prev=window.onload;
	    window.onload=function(){ if(prev)prev(); f(); }
  	}
  	
	var win= null;
	function NewWindow(mypage,myname,w,h,scroll){
		
	var winl = (screen.width-w)/2;
	var wint = (screen.height-h)/2;
	var settings ='height='+h+',';
	settings +='width='+w+',';
	settings +='top='+wint+',';
	settings +='left='+winl+',';
	settings +='scrollbars='+scroll+',';
	settings +='resizable=yes';
	win=window.open(mypage,myname,settings);
	if(parseInt(navigator.appVersion) >= 4)win.window.focus();

}

// browser test:
var ns4 = (document.layers)? true:false;
var ns6 = (document.getElementById)? true:false;
var ie = (document.all)? true:false;

var version = "0";

if ((ie) || (ns4) || (ns6)) {version = "1";}

// preload images:
if (version == "1") {

b1 = new Image();
b1.src = "templates/images/b1.gif";
b1a = new Image();
b1a.src = "templates/images/b1a.gif";
b2 = new Image();
b2.src = "templates/images/b2.gif";
b2a = new Image();
b2a.src = "templates/images/b2a.gif";
b3 = new Image();
b3.src = "templates/images/b3.gif";
b3a = new Image();
b3a.src = "templates/images/b3a.gif";
b4 = new Image();
b4.src = "templates/images/b4.gif";
b4a = new Image();
b4a.src = "templates/images/b4a.gif";
b5 = new Image();
b5.src = "templates/images/b5.gif";
b5a = new Image();
b5a.src = "templates/images/b5a.gif";
b6 = new Image();
b6.src = "templates/images/b6.gif";
b6a = new Image();
b6a.src = "templates/images/b6a.gif";
b7 = new Image();
b7.src = "templates/images/b7.gif";
b7a = new Image();
b7a.src = "templates/images/b7a.gif";
}

function hiLite(imgDocID,imgObjName) {
if (version == "1") {
document.images[imgDocID].src = eval(imgObjName + ".src")
}}