Javascript语言开发经典教程开发

				// images.js
				
				// Set image variables
				var imgPath 	= 'images/';
				var arrayHandles = new Array('out', 'over');
				
				// Dynamically create image arrays
				for (var i = 0; i < arrayHandles.length; i++) {
					eval('var ' + arrayHandles[i] + ' = new Array()');
					}
				
				// Preload the images
				for (var i = 0; i < imgNames.length; i++) {
					imagePreLoad(imgNames[i], i);
					}
				
				
				// Define a function to preload the images
				function imagePreLoad(imgName, idx) {
					for(var j = 0; j < arrayHandles.length; j++) {
						eval(arrayHandles[j] + "[" + idx + "] = new Image()");
						eval(arrayHandles[j] + "[" + idx + "].src = '" + imgPath + imgName + arrayHandles[j] + ".gif'");
						}
					}
				
				// Perform the image rollovers
				function imageSwap(imagePrefix, imageIndex, arrayIdx) {
					document[imagePrefix].src = eval(arrayHandles[arrayIdx] + "[" + imageIndex + "].src");
					}
				
				// This function displays the text passed in the browser status bar
				function display(stuff) { window.status = stuff; }