var mdiv;
function showLoad(str)
{
    var div = document.createElement("div");
	div.id = "div";
	div.innerHTML = str?str:"数据处理中，请稍候";
	
	div.style.display = "none";
	document.body.appendChild(div);
	
	mdiv=new ModelDiv("div",200,200);
	mdiv.opacity = 0;
	mdiv.show(false);
}

function closeLoad()
{
    mdiv.close();
    document.body.removeChild(mdiv.div);
}