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1、html xmlns:v=,urn:schemasmicrosoftcom:vmlbodymargin:Opx;cursor:url(叭：* Behavior: url(#default#VML)var trace=,H,var vPvar r=0var vSvar p=new Object()var lineColor=255/0/0/255/0/255p.x=0;p.y=0function init()document.body.onmousedow n 二f unction()if (eventbutton=l | | event.button=4)if (event.button=l)
2、 vP=docume ntcreateElement(”v:PolyLi ne“)； else vP=docume ntcrGateElement(”v:line”)；vS=document.createEleme ntv:strok”)vP.filled=l,falsevP.appendChild(vS)docume ntbody.appendChild(vP)trace;if (eventbutton=4) vP.from.value=event.clientX + 7 + event.clientY;document.body.o nmousemove 二 function()if (e
3、vent.button=l)pos=event.clientX + 7 + event.clientY + H;trace+=posvS.color二 ”rgb(255O0)vP.points.value=traceif (event. button=4) vP.to.value=event.clientX + 71 + event.clientY;rlmg.styleeft 二eve nt.clie ntX20;rlmg.style.top=eve nt.clientY-20;var cX = p.x-event.clientX;var cY = p.y-event.clientY;if(c
4、X|cY)status =,cX:,+cX+ -cY:+cYrotationlmg(180-parselnt(Math.atan2(cY/cX)*180/Math.PI/10)；p.x=event.clie ntX;p.y=eve nt.clientY;document.body.onmouseup=fu nction()vS.EndArrow=,BlockHdocument.onselectstart=function()return falsefunction rotationlmg(flag)window.status=r + 11 to + flag;var step=3;while(r-flag180) flag+=360while(flag-r180) flag-=360r += (flag-r)/steprlmg.style.rotation=90-r;
鼠标随移动的方向而改变
