function clog(msg){
		//return false;
		if(!document.getElementById("log-console")){
			var logDiv = document.createElement("div");
			logDiv.id="log-console";
			logDiv.name="log-console";
			logDiv.style.position = "absolute";
			logDiv.style.border = "1px solid gray";
			logDiv.style.padding = "5px";
			logDiv.style.color = "white";
			logDiv.style.background = "black";
			logDiv.style.top = 0;
			logDiv.style.left = 0;
			logDiv.style.zIndex = 99999;
			document.body.appendChild(logDiv);
			initLog();
		}
		
		var logConsole = document.getElementById('log-console');
		var newP = document.createElement("p");
		var newT = document.createTextNode(msg);
		var firstP = document.getElementsByTagName('p')[0];
		newP.appendChild(newT);
		logConsole.insertBefore(newP,firstP);
	}
	function initLog(){
		var logDiv = document.getElementById('log-console');
		var myA = document.createElement("a");
		myA.href="javascript:clearLog()";
		var aTxt = document.createTextNode("clear");
		myA.appendChild(aTxt);
		logDiv.appendChild(myA); 
		var myP = document.createElement("p");
		myP.id="log-content";
		var myTxt = document.createTextNode("===log===");
		myP.appendChild(myTxt);
		logDiv.appendChild(myP);
	}
	function clearLog(){
		document.getElementById('log-console').innerHTML = "";
		initLog();
	}