The JavaScript Source: Games: Mouse Invaders

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Mouse Invaders

Three UFOs chase your mouse cursor around the screen. If they get close enough, they even fire at it. Hilarious!

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The JavaScript Source: Games: Mouse Invaders
Simply click inside the window below, use your cursor to highlight the script, and copy (type Control-c or Apple-c) the script into a new file in your text editor (such as Note Pad or Simple Text) and save (Control-s or Apple-s). The script is yours!!!

      var starttime = 10000; // time before script starts, in milliseconds var ufocontrol = true; // can UFOs be turned off? true or false var nImpactos = 3; var nOvnis = 3; var Xpos = 0; var Ypos = 0; var STOPACCEL = 10; var TAMOVNI = 20; var REBOTE = 0.65; var isNetscape = navigator.appName == "Netscape"; var impactoActual = 0; var ovnis = new Array(); var disparos = new Array(); var impactos = new Array(); var impactos2 = new Array(); var activos = true; var fondoMovil = false; var backgroundOffset = 0; init(); function changeUFOs(element) { activos = element.checked; } function init() { var text; var i = 0; text = "<div id=imp20 style='POSITION: absolute;'>"; text += "<img src='impact2.gif' WIDTH=11 height=14 align=bottom></div>"; for (i = 0; i < nImpactos; i++) { text += "<div id=imp1" + i + " style='POSITION: absolute;'>"; text += "<img src='impact1.gif' WIDTH=23 height=31 align=bottom></div>"; } for (i = 0; i < nOvnis; i++) { text += "<div id=dis" + i + " style='POSITION: absolute;'>"; text += "<img src='bullet.gif' WIDTH=5 height=5 align=bottom></div>"; } for (i = 0; i < nOvnis; i++) { text += "<div id=ovn" + i + " style='POSITION: absolute;'>"; text += "<img src='alien.gif' WIDTH=29 height=24 align=bottom></div>"; } text += "\n"; document.write(text); for (i = 0; i < 1; i++) { impactos2[i] = new impacto2(i); impactos2[i].obj.left = -25; impactos2[i].obj.top = -25; } for (i = 0; i < nImpactos; i++) { impactos[i] = new impacto1(i); impactos[i].obj.left = -50; impactos[i].obj.top = -50; } for (i = 0; i < nOvnis; i++) { disparos[i] = new disparo(i); disparos[i].obj.left = -5; disparos[i].obj.top = -5; } for (i = 0; i < nOvnis; i++) { ovnis[i] = new ovni(i); ovnis[i].obj.left = -29; ovnis[i].obj.top = -24; } if (ufocontrol) { document.write('<form>'); document.write('<input type=checkbox onClick="changeUFOs(this)" CHECKED>'); document.write('Turn On/Off UFOs'); document.write('</form>'); } if (isNetscape) { startanimate(); } else { setTimeout("startanimate()", starttime); } } function impacto1(i) { this.X = -20; this.Y = -20; if (isNetscape) { this.obj = eval("document.imp1" + i); } else { this.obj = eval("imp1" + i + ".style"); } } function impacto2(i) { if (isNetscape) { this.obj = eval("document.imp2" + i); } else { this.obj = eval("imp2" + i + ".style"); } } function disparo(i) { this.X = -5; this.Y = -5; this.dx = 0; this.dy = 0; this.estado = 0; if (isNetscape) { this.obj = eval("document.dis" + i); } else { this.obj = eval("dis" + i + ".style"); } } function ovni(i) { this.X = -30; this.Y = -30; this.dx = 0; this.dy = 0; if (isNetscape) { this.obj = eval("document.ovn" + i); } else { this.obj = eval("ovn" + i + ".style"); } } function startanimate() { setInterval("animate()", 32); } function MoveHandlerN(e) { Xpos = e.pageX; Ypos = e.pageY; return true; } function MoveHandlerIE() { Xpos = window.event.x + document.body.scrollLeft; Ypos = window.event.y + document.body.scrollTop; } if (isNetscape) { document.captureEvents(Event.MOUSEMOVE); document.onMouseMove = MoveHandlerN; } else { document.onmousemove = MoveHandlerIE; } function animate() { var deltaX, deltaY, height, width; if (activos) { for (i = 0;i < nOvnis;i++) { if (Xpos > ovnis[i].X) ovnis[i].dx += (i+1)/5; else ovnis[i].dx -= (i+1)/5; if (ovnis[i].dx > STOPACCEL) ovnis[i].dx = STOPACCEL; if (-ovnis[i].dx > STOPACCEL) ovnis[i].dx = -STOPACCEL; if (Ypos > ovnis[i].Y) ovnis[i].dy += (i+1)/5; else ovnis[i].dy -= (i+1)/5; if (ovnis[i].dy > STOPACCEL) ovnis[i].dy = STOPACCEL; if (-ovnis[i].dy > STOPACCEL) ovnis[i].dy = -STOPACCEL; ovnis[i].X += ovnis[i].dx; ovnis[i].Y += ovnis[i].dy; deltaX = Xpos - ovnis[i].X - 10; deltaY = Ypos - ovnis[i].Y - 10; if ((disparos[i].estado == 0) && ((Math.abs(deltaX) + (Math.abs(deltaY))) < 100)) { disparos[i].dx = deltaX/10; disparos[i].dy = deltaY/10; disparos[i].estado++; } if ((disparos[i].estado > 0) && (disparos[i].estado < 12)) { disparos[i].X += disparos[i].dx; disparos[i].Y += disparos[i].dy; disparos[i].estado++; } else { if (disparos[i].estado != 0) { impactoActual++; if (impactoActual >= nImpactos) { impactoActual = 1; } impactos2[0].obj.left = impactos[impactoActual].X + 5; impactos2[0].obj.top = impactos[impactoActual].Y + 13; impactos[impactoActual].X = disparos[i].X - 10; impactos[impactoActual].Y = disparos[i].Y - 14; impactos[impactoActual].obj.left = impactos[impactoActual].X; impactos[impactoActual].obj.top = impactos[impactoActual].Y; } disparos[i].X = ovnis[i].X+10; disparos[i].Y = ovnis[i].Y+10; disparos[i].estado = 0; } if (isNetscape) { height = window.innerHeight + document.scrollTop; width = window.innerWidth + document.scrollLeft; } else { height = document.body.clientHeight + document.body.scrollTop; width = document.body.clientWidth + document.body.scrollLeft; } if (ovnis[i].Y >= height - TAMOVNI - 1) { if (ovnis[i].dy > 0) { ovnis[i].dy = REBOTE * -ovnis[i].dy; } ovnis[i].Y = height - TAMOVNI - 1; } if (ovnis[i].X >= width - TAMOVNI) { if (ovnis[i].dx > 0) { ovnis[i].dx = REBOTE * -ovnis[i].dx; } ovnis[i].X = width - TAMOVNI - 1; } if (ovnis[i].X < 0) { if (ovnis[i].dx < 0) { ovnis[i].dx = REBOTE * -ovnis[i].dx; } ovnis[i].X = 0; } if (ovnis[i].Y < 0) { if (ovnis[i].dy < 0) { ovnis[i].dy = REBOTE * -ovnis[i].dy; } ovnis[i].Y = 0; } ovnis[i].obj.left = ovnis[i].X; ovnis[i].obj.top = ovnis[i].Y; disparos[i].obj.left = disparos[i].X; disparos[i].obj.top = disparos[i].Y; } } else { if (impactoActual != nImpactos+1) { //while the UFO's are off for (i = 0;i < nOvnis;i++) { ovnis[i].obj.left = -50; ovnis[i].obj.top = -50; disparos[i].obj.left = -10; disparos[i].obj.top = -10; } for (i = 1;i < nImpactos;i++) { impactos[i].obj.left = -20; impactos[i].obj.top = -20; } impactos2[0].obj.left = -20; impactos2[0].obj.top = -20; impactoActual = nImpactos+1; } } }   <BODY> <script language="JavaScript" src="mouse-invaders.js"></script>   <p><center> <font face="arial, helvetica" SIZE="-2">Free JavaScripts provided<br> by <a href="http://javascriptsource.com">The JavaScript Source</a></font> </center><p> 
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