我想在后台上传图片时,在图片上画热点,因为图片的版式不一样,要画的区域不一样,所以要用户在上传图片后在WEB上对图片画热点。不知道这个该怎么实现,如能实现,200分相送。
谢谢。
谢谢。
解决方案 »
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-----------------------------------------------
<!--
用层的方式可以实现,下面的例子是在IE6上测试成功
//-->
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML>
<HEAD>
<TITLE> New Document </TITLE>
<META NAME="Generator" CONTENT="EditPlus">
<META NAME="Author" CONTENT="">
<META NAME="Keywords" CONTENT="">
<META NAME="Description" CONTENT="">
</script>
<style>
.Div_Drag {
position:absolute;
left:59px;
top:133px;
width:173px;
height:120px;
z-index:11111111;
visibility: hidden;
border-style:dashed;
border-color:#ff0000;
border-width : 1px;
}
</style>
<script language="JavaScript">
var bCapture= false;
var FLeft = 0;
var FTop = 0;
function AlterDrag()
{
if (!bCapture) return false;
try
{
movepositionX = event.x;
movepositionY = event.y;
with(document.all.divDrag.style)
{
var DragW = parseInt(movepositionX,10) - parseInt(FLeft,10);
var DragH = parseInt(movepositionY,10) - parseInt(FTop,10);
width = DragW > 0 ?DragW:-DragW;
height = DragH > 0 ?DragH:-DragH;
if(DragW < 0)
left = movepositionX;//FLeft + DragW;
if(DragH < 0)
top = movepositionY;// FTop + DragH;
spn1.innerHTML = " width,height: " + width + "," + height + "<br>" +
"DragW,DragH: " + DragW +"," + DragH + "<br>" +
"left,top : " + left +"," + top +"<br>"+
"FLet,FTop : " + FLeft + "," + FTop + "<br>" +
"eventx,eventy: " + movepositionX + "," + movepositionY
}
}
catch(e)
{
return false;
}
}
function OnDown()
{
//alert(event.x +"," + event.screenX);
with(document.all.divDrag.style)
{
visibility="visible" ;
left = event.x
FLeft = parseInt(left,10) ;
top = event.y
FTop = parseInt(top,10);
width= 0;
height=0;
}
}
function OnUp()
{
with(document.all.divDrag.style)
{
visibility="hidden" ;
left = -1000 ;
top = -1000 ;
width= 0;
height=0;
FLeft = 0;
FTop = 0;
}
}
</script>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1"></HEAD>
<BODY leftmargin="0" topmargin="0" marginwidth="0" marginheight="0">
<table width="100%" height="100%" border="1" align="right">
<tr>
<td width=20% bordercolor="#FF0000">
<span id="spn1"></span> <div id="divDrag" class="Div_Drag"> </td>
<td>
<img src="http://images.csdn.net/20050323/001.gif" width=400 height=300
onmousemove="javascript:AlterDrag();"
onmousedown="javascript:bCapture=true;setCapture(true);OnDown();"
onmouseup="javascript:bCapture=false;releaseCapture();"
>
</td>
</BODY>
</HTML>