<script language=javascript> whereball=0; t=0; T = new Array(); //time discrete V = new Array(); //velocity discrete B=300; //initial height var C = 36; L=70; //initial horozontal velocity g=270; //gravity a=0; f=.78; //friction T[0] = 0; T[1] = Math.pow(2*g*B,.5)/g; var n = 1; V[0] = 0; //initial verticle velocity V[1] = f*g*T[1]; notgrabbed = true; s=100; q=0; D=1; s = .1; reflect = false; D=1; nav = document.layers; IE4 = document.all; isNav4 = (nav) ? true : false; isIE4 = (IE4) ? true : false; if(isNav4){ function allobj(ID){ this.style = document.layers[ID]; } document.all = new Array(); } function init(){ if(isNav4){ end = document.layers.length; for(i=0; i < end; i++){ id = document.layers[i].name; document.all[id] = new allobj(id); } } } function catchEvent(id,event_type,function_name){ if (isNav4){ event_to_capture = "Event." + event_type.toUpperCase(); if(id=="document"){ dom = document; eval("document.captureEvents(" + event_to_capture + ")"); }else{ dom = document.layers[id]; eval("document.layers['" + id + "'].captureEvents(" + event_to_capture + ")"); } } else if(isIE4){ if(id == "document"){ dom = document; }else{ dom = document.all[id]; } } temp_event = "on" + event_type.toLowerCase(); dom[temp_event] = eval(function_name); } function letgoEvent(id,event_type,function_name){ if (isNav4){ dom = document.layers[id]; } else if(isIE4){ dom = document.all[id]; } temp_event = "on" + event_type.toLowerCase(); dom[temp_event] = null; } var X; var Y; M = 1; var obj; var canmove=false; function dragenable(id){ catchEvent(id,"mousedown","mousestart"); catchEvent("document","mousemove","mousemoving"); catchEvent("document","mouseup","mouseend"); } function mousestart(e) { canmove=true; notgrabbed=false; if (isNav4) { place = e.target.name.indexOf("1"); layername = e.target.name.substring(0,place); obj = document.layers[layername]; X=e.x; Y=e.y; return false; }else { obj = event.srcElement.parentElement.style; X=event.offsetX; Y=event.offsetY; } } horveloc = 0; verveloc = 0; setting=false; function fart(){} tee = .15; function mousemoving(e) { if (obj && canmove) { setting=true; if (isNav4) { oldcoordsX = obj.pageX - X; oldcoordsY = obj.pageY - Y; obj.moveTo((e.pageX - X), (e.pageY - Y)); newcoordsX =obj.pageX - X; newcoordsY =obj.pageY - Y; horveloc= (newcoordsX - oldcoordsX)/tee; verveloc= -(newcoordsY - oldcoordsY)/(tee); } else { oldcoordsX = obj.clientX - X + document.body.scrollLeft -100; oldcoordsY = obj.clientY - Y + document.body.scrollTop; obj.pixelLeft = event.clientX-X + document.body.scrollLeft; obj.pixelTop = event.clientY-Y + document.body.scrollTop; return false; newcoordsX = setTimeout("newcoorX()",500); newcoordsY = setTimeout("newcoorY()",500); //newcoordsX = obj.pixelLeft; //newcoordsY = obj.clientY - Y + document.body.scrollTop; horveloc= (newcoordsX - oldcoordsX)/tee; verveloc= -(newcoordsY - oldcoordsY)/(tee); M = -M; } } } function newcoorX(){ if(M==1){ coords = obj.clientX - X + document.body.scrollTop; return coords; } } function newcoorY(){ if(M==1){ coords = obj.clientY - Y + document.body.scrollTop; return coords; } } function mouseend(e) { canmove = false; obj = null; if(setting){ notgrabbed = true; n = 1; if(isIE4){ temptop = document.all['earth'].style.top.substring(0,document.all['earth'].style.top.length - 2); templeft = document.all['earth'].style.left.substring(0,document.all['earth'].style.left.length - 2); }else{ temptop = document.all['earth'].style.top; templeft = document.all['earth'].style.left; } B = K - temptop; C = templeft; L = horveloc; V[0] = verveloc; t = 0; q = 0; T[0] = 0; T[1] = (-V[0] + Math.pow(2*g*B + Math.pow(V[0],2),.5))/g; V[1] = g*T[1] + V[0]; D = 1; s = 0; doit(); setting=false; } } function doit(){ if(((whereball <= ending - 20) && (whereball >= 0)) || (reflect == true)){ if( V[n] >= s && notgrabbed){ if( t + B<=T[n] && notgrabbed){ temp = -(-.5*g*Math.pow(t - T[n-1],2) + V[n-1]*Math.abs(t - T[n-1]) + B) + K - 33; document.all["earth"].style.top = temp; document.all["earth"].style.left = D*L*q + C; t = t + .15; q = q + .15; if (navigator.appName=="Microsoft Internet Explorer") { left = document.all['earth'].style.left.substring(0,document.all['earth'].style.left.length - 2); whereball = parseInt(left); }else{ whereball=document.all['earth'].style.left; } setTimeout('doit()',20); }else if(notgrabbed){ n = n+1; t =T[n-1]; T[n] = V[n-1]/g + Math.sqrt(Math.pow(V[n-1],2))/g + T[n-1]; V[n] = f*V[n-1]; L = .99*L; if (navigator.appName=="Microsoft Internet Explorer") { left = document.all['earth'].style.left.substring(0,document.all['earth'].style.left.length - 2); whereball = parseInt(left); }else{ whereball=document.all['earth'].style.left; } B = 0; notgrabbed = true; setTimeout('doit()',20); setTimeout('changesign()',300); } } }else if(reflect==false){ D = 0 - D; reflect = true; q = 0; C = whereball; setTimeout("doit()",10); } } thisOS = navigator.appVersion; itsokay = false; if (navigator.appVersion.indexOf("4.") >= 0||navigator.appVersion.indexOf("5.") >= 0){ itsokay = true; } function changesign(){ reflect = false; s = .1; } function okay(){ if(itsokay){ setTimeout("init()",900); setTimeout("doit()",1200); } } function grabbed(){ notgrabbed = false; } </script>