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//www-master.ucoz.ru/ /* Original: Stefano Occhetti E-mail: starnuto_di_topo@hotmil.com Web Site: http://www.geocities.com/starnuto_di_topo_2001 */ var ns = (document.layers)?1:0; /* Button: this code is to show a "button" to switch the fly ON/OFF. It is always shown on the frame's bottom-right corner. ------------------------------------------------ */ var imgwidth=40; // Image width var imgheight=40; // Image height var button = Array(); // to pre-cache images button[0]=new Image(); button[0].src="Mosca_OFF.gif"; button[1]=new Image(); button[1].src="Mosca_ON.gif"; var text="

" // A bit of HTML code to display the button //Initialize some variables to make the button always to appear on the frame's bottom-right corner if (ns) { document.write(""+text+""); horz=".left"; vert=".top"; docStyle="document."; styleDoc=""; innerW="window.innerWidth"; innerH="window.innerHeight"; offsetX="window.pageXOffset"; offsetY="window.pageYOffset"; }else { document.write("

"+text+"

"); horz=".pixelLeft"; vert=".pixelTop"; docStyle=""; styleDoc=".style"; innerW="document.body.clientWidth"; innerH="document.body.clientHeight"; offsetX="document.body.scrollLeft"; offsetY="document.body.scrollTop"; } // Moves the button in the right position function checkLocation() { objectXY="FlyOnOff"; var availableX=eval(innerW); var availableY=eval(innerH); var currentX=eval(offsetX); var currentY=eval(offsetY); x=availableX-(imgwidth+30)+currentX; y=availableY-(imgheight+20)+currentY; eval(docStyle + objectXY + styleDoc + horz + "=" + x); eval(docStyle + objectXY + styleDoc + vert + "=" + y); } setInterval('checkLocation()', 10); /* end of Button management ------------------------------------------------ */ /* Fly: this code provides some facilities to show a fly moving on the screen. The fly does not actually follow the mouse, but a "Dot" (not shown!). ------------------------------------------------ */ (document.layers)?window.captureEvents(Event.MOUSEMOVE):0; (document.layers)?window.onMouseMove=getMousePosition:document.onmousemove=getMousePosition; var Dot_Ro=60; //Dot's distance from the mouse pointer var Dot_Theta=0; //Dot's initial angle var Dot_Speed; //Dot's absolute Angular speed var Dot_Direction=1; //Dot's direction (1=clockwise) var Dot_x=0; //Dot's original position var Dot_y=0; var alpha; //Angle from the fly to the mouse var mult; //Ausiliary variable to define the angle var picX = 20; //Fly's coords. var picY = 100; var mouseX = 0; //Mouse coords. var mouseY = 0; var step = 10; //Pixels var speed = 100;//u-seconds // Dir specifies the right picture; // img pre-caches images. var dir = Array(); dir[-4]="Mosca_3.gif"; dir[-1]="Mosca_6.gif"; dir[-2]="Mosca_5.gif"; dir[-3]="Mosca_4.gif"; dir[3]="Mosca_8.gif"; dir[4]="Mosca_7.gif"; dir[1]="Mosca_2.gif"; dir[2]="Mosca_1.gif"; dir[0]=""; var img = Array(); for (var i=-4; i<5; i++){ img[i]=new Image(); img[i].src=""+dir[i]; } // Some HTML code to show the fly. if (ns) { document.write("

"); }else { document.write("

"); document.write("

"); } // Shows the proper image for the fly. function display(direction) { //direction must be from -4 to 4, but not 0. if (ns) { document.pic.src = img[direction].src; }else{ pic.src = img[direction].src; } } function getMousePosition(e) { mouseY=(ns)?e.pageY:window.event.y + document.body.scrollTop; mouseX=(ns)?e.pageX:window.event.x + document.body.scrollLeft; } //Calculate new position function calcNewPos() { /* All this calculations make the Dot to come near the mouse-pointer, and the fly to follow the dot. */ var dist=Math.sqrt(Math.pow(mouseY-picY,2) + Math.pow(mouseX-picX,2)); Dot_Speed=Math.PI/15; Dot_Theta+=Dot_Direction*Dot_Speed; Dot_x=mouseX+Dot_Ro*Math.cos(Dot_Theta); Dot_y=mouseY+Dot_Ro*Math.sin(Dot_Theta); var arg = (Dot_y-picY) / (Dot_x-picX); mult = (Dot_x - picX < 0)? mult = -1:1; alpha = Math.atan(arg); var dx = mult * step * Math.cos(alpha); var dy = mult * step * Math.sin(alpha); picX += dx; picY += dy; } //Shows or hides the fly when the "button" is pressed function showhideAnimation() { if (ns) { document.layers['FlyDiv'].visibility=document.layers['FlyDiv'].visibility=="hide"?"show":"hide"; document.Button.src = document.layers['FlyDiv'].visibility=="hide"?button[1].src:button[0].src; }else { FlyDiv.style.visibility=="hidden"?FlyDiv.style.visibility = "visible":FlyDiv.style.visibility = "hidden"; Button.src = FlyDiv.style.visibility=="hidden"?button[1].src:button[0].src; } } // Moves the fly around the screen function moveFly() { // moves the fly in a new position... calcNewPos(); if (ns) { document.layers['FlyDiv'].left = picX; document.layers['FlyDiv'].top = picY; }else{ FlyDiv.style.left = picX - pic.width / 2; FlyDiv.style.top = picY - pic.height / 2; } // ... and changes the image. alpha=-180*alpha/Math.PI; alpha+=22.5; var OK=0; for(var i=0; (i<4)&& !OK; i++){ if (alpha<-Math.PI+45*i){ display(mult*(i+1)); OK=1; } } } // Changes Dot's turning direction function ChangeDotDirection() { Dot_Direction=-Dot_Direction; Dot_Theta+=Math.PI; } //Go! setInterval('moveFly()', speed); setInterval('ChangeDotDirection()', speed*50); /* The end. ------------------------------------------------ */