<script language="JavaScript">
var objID="";
function createDiv(x,y)
{
var thisID = "DIV_"+Math.random();
var html = "<div id=\""+thisID+"\" style=\"position:absolute;top:"+y+";left:"+x+";width:10;height:10;border:0;background-color:red;\"><span></span></div>";
document.body.insertAdjacentHTML("beforeEnd",html);
return thisID;
}function point(x,y)
{
if(isNaN(x)||isNaN(y))return;
if(!objID)objID = createDiv(x,y);
var obj = document.getElementById(objID);
obj.style.posLeft = x;
obj.style.posTop = y;
}function flashPoint()
{
var obj = document.getElementById(objID);
if(obj)
{
obj.style.display=(obj.style.display=="none")?"":"none";
}
setTimeout("flashPoint('"+objID+"')",1000);
}
flashPoint();
</script>
X:<input type="text" id="Px">
Y:<input type="text" id="Py">
<input type="button" onclick="point(Px.value,Py.value);" value="设置">