用javascript如何在网页上画框? add a table/div/.... around where you want to draw and make the border visible 解决方案 » 免费领取超大流量手机卡,每月29元包185G流量+100分钟通话, 中国电信官方发货 画框,用CSS是吗?类似:<table border="0" width="200" style="border:5px solid green"><tr><td>aaaaaaaaaa.<br>bbbbbbbbbbbbb.<br>ccccccccccccc.<br></td></tr></table> javascript中几个绘图的函数:<html><head><title>JavaScript绘图</title><script language="JavaScript">IE4 = ! (navigator.appVersion.charAt(0) < "4" || navigator.appName == "Netscape")var xo=0var yo=0var Ox = -1var Oy = -1var rad = Math.PI/180var maxY = 400var color = "red"function print(str) {document.write(str)}function orgY(y) {return maxY-y}function outPlot(x,y,w,h) {print('<span style="position:absolute;left:'+x+';top:'+y+';height:'+h+';width:'+w+';font-size:1px;background-color:'+color+'"></span>')}function Plot(x,y) {outPlot(x,y,1,1)if(Ox>=0 || Oy>=0) {ShowLine(Ox,Oy,x-Ox,y-Oy)}Ox = xOy = y}function ShowLine(x,y,w,h) {if(w<0) {x += ww = Math.abs(w)}if(h<0) {y += hh = Math.abs(h)}if(w<1) w=1if(h<1) h=1outPlot(x,y,Math.round(w),Math.round(h))}function LineTo(x,y) {Line(xo,yo,x,y)}function sign(n) {if(n>0)return 1if(n<0)return -1return n}function Line(x1,y1,x2,y2) {x2 = Math.round(x2)y2 = Math.round(y2)xo = x2yo = y2y1 = orgY(y1)y2 = orgY(y2)var str = ""var i=0var x = x1var y = y1dx = Math.abs(x2-x1)dy = Math.abs(y2-y1)s1 = sign(x2-x1)s2 = sign(y2-y1)if(dx==0 || dy==0) {ShowLine(x1,y1,x2-x1,y2-y1)return}if(dx>dy) {temp = dxdx = dydy = tempkey = 1}elsekey = 0e = 2*dy-dxfor(i=0;i<dx;i++) {px = 0py = 0Plot(x,y)while(e>=0) {if(key==1) {x += s1px += s1}else {y += s2py += s2}e = e-2*dx}if(key==1)y += s2elsex += s1e = e+2*dy}} function MoveTo(x,y) {Ox = Oy = -1xo = Math.round(x)yo = Math.round(y)}// 圆function Cir(x,y,r) {MoveTo(x+r,y)for(i=0;i<=360;i+=5) {LineTo(r*Math.cos(i*rad)+x,r*Math.sin(i*rad)+y)}}// 弧形function Arc(x,y,r,a1,a2) {MoveTo(r*Math.cos(a1*rad)+x,r*Math.sin(a1*rad)+y)for(i=a1;i<=a2;i++) {LineTo(r*Math.cos(i*rad)+x,r*Math.sin(i*rad)+y)}}// 扇形function Pei(x,y,r,a1,a2) {MoveTo(x,y)for(var i=a1;i<=a2;i++) {LineTo(r*Math.cos(i*rad)+x,r*Math.sin(i*rad)+y)}LineTo(x,y)}// 弹出扇形function PopPei(x,y,r,a1,a2) {dx = r*Math.cos((a1+(a2-a1)/2)*rad)/10dy = r*Math.sin((a1+(a2-a1)/2)*rad)/10x += dxy += dyMoveTo(x,y)for(var i=a1;i<=a2;i++) {LineTo(r*Math.cos(i*rad)+x,r*Math.sin(i*rad)+y)}LineTo(x,y)}// 矩形function Rect(x,y,w,h) {MoveTo(x,y)LineTo(x+w,y)LineTo(x+w,y+h)LineTo(x,y+h)LineTo(x,y)}// 准星function zhunxing(x,y) {var ox = xovar oy = yovar oColor = colorcolor = "#000000"Line(x-5,y,x+6,y)Line(x,y-6,x,y+5)print('<span style="position:absolute;font-size:10pt;left:'+(x+5)+';top:'+orgY(y+5)+';">['+x+','+y+']</span>')color = oColorxo = oxyo = oy}// 标注function biaozhuStr(x,y,s) {return '<span style="position:absolute;font-size:10pt;left:'+x+';top:'+orgY(y)+';">'+s+'</span>'}function biaozhu(x,y,s,t) {var ox = xovar oy = yovar oColor = colorpoint = "p01.gif"if(t==1) {print(biaozhuStr(x-5,y+6,"·"+s))}if(t==2) {print(biaozhuStr(xo+x*Math.cos(y*rad)-10,yo+x*Math.sin(y*rad),s))}color = oColorxo = oxyo = oy}</script></head><body><table border="0" width="100%"><tr><td width="100%" style="font-family: 方正舒体; font-size: 18pt; color: #FF0000" class="t1">JavaScript绘图</td></tr><tr><td width="100%" style="font-family: 幼圆; font-size: 12pt; color: #008000" class="t2"> 如果需要在网页上提供图形化的资料,通常是将其制作成图片,但这样一来网络上的开销就太大了。有什么办法呢?这里向你提供一组JavaScript函数,来解决这一问题。虽然简单了点,但是对画点线图来说还是绰绰有余的!</td></tr></table><script>if(IE4) {// 基本图形color = "maroon"Cir(50,40,20)Arc(100,40,20,60,120)Pei(150,60,40,240,300)Rect(200,20,40,40)// 折线图color = "#FF0000"var jd = new Array(203,232,277,223,271,234,273,284,276,250,267,280)MoveTo(30,jd[0]-40)biaozhu(xo,yo,jd[0])for(i=1;i<jd.length;i++) {LineTo(i*30+30,jd[i]-40)biaozhu(xo,yo,jd[i],1)}color = "#C0C0C0"Line(30,140,i*30+30,140)Line(30,140,30,260)// 饼图color = "#00FF00"var gc = new Array(150,120,200,180,180)var s = 0var m = 0var n = 0for(i=0;i<gc.length;i++) {s +=gc[i]if(gc[i] > m) {m = gc[i]n = i}}var k = s/360var mm = 0var a =0for(i=0;i<gc.length;i++) {b = Math.round((gc[i]+mm)/k)if(i==n)PopPei(600,150,100,a,b)elsePei(600,150,100,a,b)biaozhu(60,a+(b-a)/2,Math.round(gc[i]/s*100)+"%",2)mm = mm+gc[i]a = b}// 十字标注MoveTo(280,20)zhunxing(xo,yo)}else {document.write("<p> </p><table bgcolor=#FF0000><tr><td><font color=#FFFF00>对不起!您的浏览器不能支持该页的某些功能,请换用IE4.0以上版本的浏览器!谢谢!</font></td></tr></table>")}</script></body></html> 新人求教 submit 提交表单后的 前台事件 计时器不能用,求救。 对于一个函数,当执行到函数中间时,有没有什么办法可以暂停等待指定的时间,再执行剩下的代码 网页打印的特殊问题,不是老生常谈的,请帮忙看看 有没有用JAVASCRIPT检验二进制,十进制数据的呢? 树型菜单问题 如何实现表行的自由移动和保存表格行顺序的功能 如何这样自定义滚动条? ajax解析xml问题 50分求救:用JAVASCRIPT写MOD/10验证卡号的例子,在线等待中。。。 frame 中 刷新的问题;
<tr>
<td>aaaaaaaaaa.<br>bbbbbbbbbbbbb.<br>ccccccccccccc.<br></td>
</tr>
</table>
<head>
<title>JavaScript绘图</title>
<script language="JavaScript">
IE4 = ! (navigator.appVersion.charAt(0) < "4" || navigator.appName == "Netscape")var xo=0
var yo=0
var Ox = -1
var Oy = -1var rad = Math.PI/180
var maxY = 400
var color = "red"function print(str) {
document.write(str)
}function orgY(y) {
return maxY-y
}
function outPlot(x,y,w,h) {
print('<span style="position:absolute;left:'+x+';top:'+y+';height:'+h+';width:'+w+';font-size:1px;background-color:'+color+'"></span>')
}function Plot(x,y) {
outPlot(x,y,1,1)
if(Ox>=0 || Oy>=0) {
ShowLine(Ox,Oy,x-Ox,y-Oy)
}
Ox = x
Oy = y
}function ShowLine(x,y,w,h) {
if(w<0) {
x += w
w = Math.abs(w)
}
if(h<0) {
y += h
h = Math.abs(h)
}
if(w<1) w=1
if(h<1) h=1
outPlot(x,y,Math.round(w),Math.round(h))
}function LineTo(x,y) {
Line(xo,yo,x,y)
}function sign(n) {
if(n>0)
return 1
if(n<0)
return -1
return n
}function Line(x1,y1,x2,y2) {
x2 = Math.round(x2)
y2 = Math.round(y2)
xo = x2
yo = y2
y1 = orgY(y1)
y2 = orgY(y2)
var str = ""
var i=0var x = x1
var y = y1
dx = Math.abs(x2-x1)
dy = Math.abs(y2-y1)
s1 = sign(x2-x1)
s2 = sign(y2-y1)if(dx==0 || dy==0) {
ShowLine(x1,y1,x2-x1,y2-y1)
return
}if(dx>dy) {
temp = dx
dx = dy
dy = temp
key = 1
}else
key = 0
e = 2*dy-dxfor(i=0;i<dx;i++) {
px = 0
py = 0
Plot(x,y)
while(e>=0) {
if(key==1) {
x += s1
px += s1
}else {
y += s2
py += s2
}
e = e-2*dx
}
if(key==1)
y += s2
else
x += s1
e = e+2*dy
}
} function MoveTo(x,y) {
Ox = Oy = -1
xo = Math.round(x)
yo = Math.round(y)
}// 圆
function Cir(x,y,r) {
MoveTo(x+r,y)
for(i=0;i<=360;i+=5) {
LineTo(r*Math.cos(i*rad)+x,r*Math.sin(i*rad)+y)
}
}
// 弧形
function Arc(x,y,r,a1,a2) {
MoveTo(r*Math.cos(a1*rad)+x,r*Math.sin(a1*rad)+y)
for(i=a1;i<=a2;i++) {
LineTo(r*Math.cos(i*rad)+x,r*Math.sin(i*rad)+y)
}
}
// 扇形
function Pei(x,y,r,a1,a2) {
MoveTo(x,y)
for(var i=a1;i<=a2;i++) {
LineTo(r*Math.cos(i*rad)+x,r*Math.sin(i*rad)+y)
}
LineTo(x,y)
}
// 弹出扇形
function PopPei(x,y,r,a1,a2) {
dx = r*Math.cos((a1+(a2-a1)/2)*rad)/10
dy = r*Math.sin((a1+(a2-a1)/2)*rad)/10
x += dx
y += dy
MoveTo(x,y)
for(var i=a1;i<=a2;i++) {
LineTo(r*Math.cos(i*rad)+x,r*Math.sin(i*rad)+y)
}
LineTo(x,y)
}// 矩形
function Rect(x,y,w,h) {
MoveTo(x,y)
LineTo(x+w,y)
LineTo(x+w,y+h)
LineTo(x,y+h)
LineTo(x,y)
}// 准星
function zhunxing(x,y) {
var ox = xo
var oy = yo
var oColor = color
color = "#000000"
Line(x-5,y,x+6,y)
Line(x,y-6,x,y+5)
print('<span style="position:absolute;font-size:10pt;left:'+(x+5)+';top:'+orgY(y+5)+';">['+x+','+y+']</span>')
color = oColor
xo = ox
yo = oy
}
// 标注
function biaozhuStr(x,y,s) {
return '<span style="position:absolute;font-size:10pt;left:'+x+';top:'+orgY(y)+';">'+s+'</span>'
}
function biaozhu(x,y,s,t) {
var ox = xo
var oy = yo
var oColor = color
point = "p01.gif"
if(t==1) {
print(biaozhuStr(x-5,y+6,"·"+s))
}
if(t==2) {
print(biaozhuStr(xo+x*Math.cos(y*rad)-10,yo+x*Math.sin(y*rad),s))
}
color = oColor
xo = ox
yo = oy
}
</script>
</head><body>
<table border="0" width="100%">
<tr>
<td width="100%" style="font-family: 方正舒体; font-size: 18pt; color: #FF0000" class="t1">JavaScript绘图</td>
</tr>
<tr>
<td width="100%" style="font-family: 幼圆; font-size: 12pt; color: #008000" class="t2">
如果需要在网页上提供图形化的资料,通常是将其制作成图片,但这样一来网络上的开销就太大了。有什么办法呢?这里向你提供一组JavaScript函数,来解决这一问题。虽然简单了点,但是对画点线图来说还是绰绰有余的!</td>
</tr>
</table><script>
if(IE4) {// 基本图形
color = "maroon"
Cir(50,40,20)
Arc(100,40,20,60,120)
Pei(150,60,40,240,300)
Rect(200,20,40,40)// 折线图
color = "#FF0000"
var jd = new Array(
203,232,277,223,271,234,273,284,276,250,267,280
)
MoveTo(30,jd[0]-40)
biaozhu(xo,yo,jd[0])
for(i=1;i<jd.length;i++) {
LineTo(i*30+30,jd[i]-40)
biaozhu(xo,yo,jd[i],1)
}
color = "#C0C0C0"
Line(30,140,i*30+30,140)
Line(30,140,30,260)// 饼图
color = "#00FF00"
var gc = new Array(
150,120,200,180,180
)
var s = 0
var m = 0
var n = 0
for(i=0;i<gc.length;i++) {
s +=gc[i]
if(gc[i] > m) {
m = gc[i]
n = i
}
}
var k = s/360
var mm = 0
var a =0
for(i=0;i<gc.length;i++) {
b = Math.round((gc[i]+mm)/k)
if(i==n)
PopPei(600,150,100,a,b)
else
Pei(600,150,100,a,b)
biaozhu(60,a+(b-a)/2,Math.round(gc[i]/s*100)+"%",2)
mm = mm+gc[i]
a = b
}// 十字标注
MoveTo(280,20)
zhunxing(xo,yo)}else {
document.write("<p> </p><table bgcolor=#FF0000><tr><td><font color=#FFFF00>对不起!您的浏览器不能支持该页的某些功能,请换用IE4.0以上版本的浏览器!谢谢!</font></td></tr></table>")
}
</script></body>
</html>