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<script>
function show()
{
var obj=document.getElementById("menuLeft");
var offsetTop = document.documentElement.scrollTop + event.clientY + 15; //滚动条的上边距+鼠标上边距
var offsetLeft = event.clientX;
obj.style.top=offsetTop+"px";
obj.style.left=offsetLeft+"px";
obj.style.position="absolute"//设置坐标为绝对位置
obj.style.display="";
obj.style.width="130px";
obj.style.height="30px";
obj.innerText="该问题总分值为:";
}
function yan()
{
var obj=document.getElementById("menuLeft");
obj.style.display="none";
}
</script>
<body>
<input id="haha" onfocus="javascript:show();" onblur="javascript:yan();" type="text">
<div id="menuLeft" style="border: 1px #ccc solid; color: Red; display: none">
</div>
</body>