<head id="Head1" runat="server">
<script type="text/javascript" language="javascript">
function main(){
drawLine(0,0,100,100);
}
function drawDot(x,y) //画点函数
{
document.write("<div style='height:1px;position:absolute;left:"+x+"px;top:"+y+"px;width:1px;background:#da70d6;overflow:hidden'></div>") ;
}
function drawLine(x1,y1,x2,y2)//画线
{
var i;
var r=Math.floor(Math.sqrt((x2-x1)*(x2-x1)+(y2-y1)*(y2-y1)));
var theta=Math.atan((y2-y1)/(x2-x1));
if(((y2-y1)<0&&(x2-x1)>=0)||((y2-y1)>0&&(x2-x1)<0))
theta=Math.PI+theta;
var dx=Math.cos(theta);
var dy=Math.sin(theta);
{
if(((y2-y1)>=0&&(x2-x1)>0)||((y2-y1)>0&&(x2-x1)<=0))
{
for(i=0;i<r;i+=2)
drawDot(x1+i*dx,y1+i*dy);
}
else
for(i=0;i<r;i+=2)
drawDot(x1-i*dx,y1-i*dy);
}
}
</script>
</head>
<body onload=" main()">
</body>
这条线为什么显示不出来？
<script type="text/javascript" language="javascript">
function main(){
drawLine(0,0,100,100);
}
function drawDot(x,y) //画点函数
{
document.write("<div style='height:1px;position:absolute;left:"+x+"px;top:"+y+"px;width:1px;background:#da70d6;overflow:hidden'></div>") ;
}
function drawLine(x1,y1,x2,y2)//画线
{
var i;
var r=Math.floor(Math.sqrt((x2-x1)*(x2-x1)+(y2-y1)*(y2-y1)));
var theta=Math.atan((y2-y1)/(x2-x1));
if(((y2-y1)<0&&(x2-x1)>=0)||((y2-y1)>0&&(x2-x1)<0))
theta=Math.PI+theta;
var dx=Math.cos(theta);
var dy=Math.sin(theta);
{
if(((y2-y1)>=0&&(x2-x1)>0)||((y2-y1)>0&&(x2-x1)<=0))
{
for(i=0;i<r;i+=2)
drawDot(x1+i*dx,y1+i*dy);
}
else
for(i=0;i<r;i+=2)
drawDot(x1-i*dx,y1-i*dy);
}
}
</script>
</head>
<body onload=" main()">
</body>
这条线为什么显示不出来？
function main(){ drawLine(0,0,100,100);
}
function drawDot(x,y) //画点函数
{
var div = document.createElement('div')
div.style.cssText="height:1px;position:absolute;left:"+x+"px;top:"+y+"px;width:1px;background:#da70d6;overflow:hidden"
document.body.appendChild(div)
}
function drawLine(x1,y1,x2,y2)//画线
{
var i;
var r=Math.floor(Math.sqrt((x2-x1)*(x2-x1)+(y2-y1)*(y2-y1)));
var theta=Math.atan((y2-y1)/(x2-x1));
if(((y2-y1)<0&&(x2-x1)>=0)||((y2-y1)>0&&(x2-x1)<0))
theta=Math.PI+theta;
var dx=Math.cos(theta);
var dy=Math.sin(theta);
{
if(((y2-y1)>=0&&(x2-x1)>0)||((y2-y1)>0&&(x2-x1)<=0))
{
for(i=0;i<r;i+=2)
drawDot(x1+i*dx,y1+i*dy);
}
else
for(i=0;i<r;i+=2)
drawDot(x1-i*dx,y1-i*dy);
}
}
</script>
</head>
<body onload="main()">
</body>
{if(i<num/2)
{
x=left-((2*i+1)/2)*aditonw-i*w;
y=top+h+adtionh;
createDiv1(x,y,name);
var LineX=x+w/2;
var LineY=y;
var ParentX=left+w;
var ParentY=top+h;
drawLine( LineX, LineY,ParentX,ParentY); }为什么画不出线 }