var div = document.createElement("DIV");
function msg(str)
{
	var x = 0;
	var y = 0;
	var left = 0;
	var top = 0;

	x = (document.documentElement.offsetWidth / 2)-210;
	y = document.documentElement.scrollTop + 200;
	left = document.body.scrollLeft + x;
	top = document.body.scrollTop + y;
	if(window.innerHeight)
	{
		myHeight = window.innerHeight + window.scrollMaxY;
	}
	else if(document.documentElement && ( document.documentElement.clientWidth || document.documentElement.clientHeight ))
  	{
	    myHeight = document.body.scrollHeight;
  	}
  	else
	{
	    myHeight = document.body.offsetHeight;
	}

	html = "<div style=\"position:absolute;top:" + top + "px;left:" + left + "px;width:400px;background-color:rgb(235,235,235);font-weight:bold;text-align:left;padding:20px;z-index:101;\">" + str + "<br><br><div style=\"width:400px;text-align:center;\"><button onclick=\"return closemsg(1);\" style=\"width:50px;\" class=\"button\">OK</button>";

	html += "</div></div><div style=\"position:absolute;left:0;top:0;width:100%;height:"+myHeight+"px;filter:alpha(opacity=80);-moz-opacity:.80;opacity:.80;background-color:white;z-index:100;\"></div>";
	div.innerHTML = html;
	document.body.appendChild(div);
}

function closemsg(mode)
{
	document.body.removeChild(div);
	switch(mode)
	{
		case 1:return true;break;
		case 0:return false;break;
	}
}