javaScript+vml画线
<SCRIPT LANGUAGE="JavaScript">
var x,y,a,b;
function drawline(fromX,fromY,toX,toY){
var strElement= "<v:Line id='line_"+fromX+"_"+fromY+"_"+toX+"_"+toY+"' from='" + fromX + "," + fromY + "' to='" + toX + "," + toY + "' strokecolor='red'></v:Line>";
var newPoint = document.createElement(strElement);
document.getElementById("map").appendChild(newPoint);
}
function draw(){
if(x==undefined&&b==undefined){x=window.event.x;y=window.event.y;return false;}
a=window.event.x;b=window.event.y;
drawline(x,y,a,b)
x=a;y=b;
}
function draws(){
if(x==undefined&&b==undefined){return false;}
if(x==window.event.x&&b==window.event.y){return false;}
if(document.getElementById("TempLine")){document.getElementById("TempLine").outerHTML=""}
var strElement= "<v:Line id='TempLine' from='" + x + "," + y + "' to='" + window.event.x + "," + window.event.y + "' strokecolor='red'></v:Line>";
var newPoint = document.createElement(strElement);
document.getElementById("map").appendChild(newPoint);
}
</SCRIPT>
<html xmlns:v="urn:schemas-microsoft-com:vml">
<HEAD>
<META http-equiv="Content-Type" content="text/html;Charset=gb2312">
<title>vml实例</title>
<STYLE>
v\:*{behavior:url(#default#VML);}/*声明V为VML变量*/
</STYLE>
</HEAD>
<BODY>
<table border="1" align="center">
<tr>
<td><div id="map" style="width:600px;height:500px;background-color:#cccccc;position:relative;" onmousedown="draw();" onmousemove="draws()"></div></td>
</tr>
</table>
</body>
</html>
var x,y,a,b;
function drawline(fromX,fromY,toX,toY){
var strElement= "<v:Line id='line_"+fromX+"_"+fromY+"_"+toX+"_"+toY+"' from='" + fromX + "," + fromY + "' to='" + toX + "," + toY + "' strokecolor='red'></v:Line>";
var newPoint = document.createElement(strElement);
document.getElementById("map").appendChild(newPoint);
}
function draw(){
if(x==undefined&&b==undefined){x=window.event.x;y=window.event.y;return false;}
a=window.event.x;b=window.event.y;
drawline(x,y,a,b)
x=a;y=b;
}
function draws(){
if(x==undefined&&b==undefined){return false;}
if(x==window.event.x&&b==window.event.y){return false;}
if(document.getElementById("TempLine")){document.getElementById("TempLine").outerHTML=""}
var strElement= "<v:Line id='TempLine' from='" + x + "," + y + "' to='" + window.event.x + "," + window.event.y + "' strokecolor='red'></v:Line>";
var newPoint = document.createElement(strElement);
document.getElementById("map").appendChild(newPoint);
}
</SCRIPT>
<html xmlns:v="urn:schemas-microsoft-com:vml">
<HEAD>
<META http-equiv="Content-Type" content="text/html;Charset=gb2312">
<title>vml实例</title>
<STYLE>
v\:*{behavior:url(#default#VML);}/*声明V为VML变量*/
</STYLE>
</HEAD>
<BODY>
<table border="1" align="center">
<tr>
<td><div id="map" style="width:600px;height:500px;background-color:#cccccc;position:relative;" onmousedown="draw();" onmousemove="draws()"></div></td>
</tr>
</table>
</body>
</html>