function showTip(oEvent,text) {
    var oDiv = document.getElementById(text);
    oDiv.style.visibility = "visible";
    oDiv.style.left = oEvent.clientX + 5;
    oDiv.style.top = oEvent.clientY + 10;
    }

function hideTip(oEvent,text) {
    var oDiv = document.getElementById(text);
    oDiv.style.visibility = "hidden";
    }