//显示联系我们区域

function showLinkArea()
{document.getElementById("demoArea")
    var demoAreaObject=document.getElementById("demoArea");
    demoAreaObject.style.position="absolute";
    demoAreaObject.style.top="700px";
    demoAreaObject.style.left="400px";
    demoAreaObject.style.zIndex="1000";
    demoAreaObject.style.display="block";
}

function hiddenArea()
{
    var demoAreaObject=document.getElementById("demoArea");
    demoAreaObject.style.display="none";
}