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本文實(shí)例講述了javascript實(shí)現(xiàn)的圖片預(yù)覽功能。分享給大家供大家參考,具體如下:
1.將下面的代碼復(fù)制到<head>內(nèi)
<script> /* Thumbnail image viewer- ?Dynamic Drive (www.dynamicdrive.com) For full source code, usage terms, and 100's more DHTML scripts, visit http://dynamicdrive.com */ function enlarge(which,e){ //Render image code for IE 4+ if (document.all){ if (showimage.style.visibility=="hidden"){ showimage.style.left=document.body.scrollLeft+event.clientX showimage.style.top=document.body.scrollTop+event.clientY showimage.innerHTML='<img src="'+which+'">' showimage.style.visibility="visible" } else showimage.style.visibility="hidden" return false } //Render image code for NS 4 else if (document.layers){ if (document.showimage.visibility=="hide"){ document.showimage.document.write('<a href="#" rel="external nofollow" onMouseover="drag_dropns(showimage)"><img src="'+which+'" border=0></a>') document.showimage.document.close() document.showimage.left=e.x document.showimage.top=e.y document.showimage.visibility="show" } else document.showimage.visibility="hide" return false } //if NOT IE 4+ or NS 4, simply display image in full browser window else return true } </script> <script language="JavaScript1.2"> //By Dynamicdrive.com //drag drop function for NS 4//// ///////////////////////////////// var nsx var nsy var nstemp function drag_dropns(name){ temp=eval(name) temp.captureEvents(Event.MOUSEDOWN | Event.MOUSEUP) temp.onmousedown=gons temp.onmousemove=dragns temp.onmouseup=stopns } function gons(e){ temp.captureEvents(Event.MOUSEMOVE) nsx=e.x nsy=e.y } function dragns(e){ temp.moveBy(e.x-nsx,e.y-nsy) return false } function stopns(){ temp.releaseEvents(Event.MOUSEMOVE) } //drag drop function for IE 4+//// ///////////////////////////////// var dragapproved=false function drag_dropie(){ if (dragapproved==true){ document.all.showimage.style.pixelLeft=tempx+event.clientX-iex document.all.showimage.style.pixelTop=tempy+event.clientY-iey return false } } function initializedragie(){ if (event.srcElement.parentElement.id=="showimage"){ iex=event.clientX iey=event.clientY tempx=showimage.style.pixelLeft tempy=showimage.style.pixelTop dragapproved=true document.onmousemove=drag_dropie } } if (document.all){ document.onmousedown=initializedragie document.onmouseup=new Function("dragapproved=false") } </script>
2.在<body>中加入
3.在連接圖片的地方這樣寫
記得更改圖片路徑
更多關(guān)于JavaScript相關(guān)內(nèi)容感興趣的讀者可查看本站專題:《JavaScript圖片操作技巧大全》、《JavaScript切換特效與技巧總結(jié)》、《JavaScript圖形繪制技巧總結(jié)》、《JavaScript查找算法技巧總結(jié)》、《JavaScript錯(cuò)誤與調(diào)試技巧總結(jié)》、《JavaScript數(shù)據(jù)結(jié)構(gòu)與算法技巧總結(jié)》、《JavaScript遍歷算法與技巧總結(jié)》及《JavaScript數(shù)學(xué)運(yùn)算用法總結(jié)》
希望本文所述對(duì)大家JavaScript程序設(shè)計(jì)有所幫助。
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