Rasmni kattalashtirish (zoom)

function imageZoom(imgID, resultID) {   var img, lens, result, cx, cy;   img = document.getElementById(imgID);   result = document.getElementById(resultID);   /* Create lens: */   lens = document.createElement("DIV");   lens.setAttribute("class", "img-zoom-lens");   /* Insert lens: */   img.parentElement.insertBefore(lens, img);   /* Calculate the ratio between result DIV and lens: */   cx = result.offsetWidth / lens.offsetWidth;   cy = result.offsetHeight / lens.offsetHeight;   /* Set background properties for the result DIV */   result.style.backgroundImage = "url('" + img.src + "')";   result.style.backgroundSize = (img.width * cx) + "px " + (img.height * cy) + "px";   /* Execute a function when someone moves the cursor over the image, or the lens: */   lens.addEventListener("mousemove", moveLens);   img.addEventListener("mousemove", moveLens);   /* And also for touch screens: */   lens.addEventListener("touchmove", moveLens);   img.addEventListener("touchmove", moveLens);   function moveLens(e) {     var pos, x, y;     /* Prevent any other actions that may occur when moving over the image */     e.preventDefault();     /* Get the cursor's x and y positions: */     pos = getCursorPos(e);     /* Calculate the position of the lens: */     x = pos.x - (lens.offsetWidth / 2);     y = pos.y - (lens.offsetHeight / 2);     /* Prevent the lens from being positioned outside the image: */     if (x > img.width - lens.offsetWidth) {x = img.width - lens.offsetWidth;}     if (x < 0) {x = 0;}     if (y > img.height - lens.offsetHeight) {y = img.height - lens.offsetHeight;}     if (y < 0) {y = 0;}     /* Set the position of the lens: */     lens.style.left = x + "px";     lens.style.top = y + "px";     /* Display what the lens "sees": */     result.style.backgroundPosition = "-" + (x * cx) + "px -" + (y * cy) + "px";   }   function getCursorPos(e) {     var a, x = 0, y = 0;     e = e || window.event;     /* Get the x and y positions of the image: */     a = img.getBoundingClientRect();     /* Calculate the cursor's x and y coordinates, relative to the image: */     x = e.pageX - a.left;     y = e.pageY - a.top;     /* Consider any page scrolling: */     x = x - window.pageXOffset;     y = y - window.pageYOffset;     return {x : x, y : y};   } }