Ajax Programming – Ajax Development Services
Are you using AJAX to create interactive web applications?
Ajax is a group of interrelated web development techniques used on the client-side to create interactive web applications. Like DHTML and LAMP, Ajax is not a technology in itself, but a group of technologies. Ajax uses a combination of HTML and CSS to mark up and style information. With Ajax, web applications can retrieve data from the server asynchronously in the background without interfering with the display and behavior of the existing page. The use of Ajax techniques has led to an increase in interactive or dynamic interfaces on web pages. The technology is advancing at a lightening fast pace and making way to more innovations which have made a difference in today’s world. One such revolution that has dramatically transformed the virtual web world is Asynchronous JavaScript and XML or AJAX.
If you have heard a lot about this word and are curious to explore as to what sort of profit it will incur to your website, this is the right article for you to acquaint yourself with this technology. This application has made Google Maps, an instant hit with the users, thanks to its quick page loading which allowed the users to scroll down the maps very conveniently without waiting the page to get loaded. This has resulted in the increase of the AJAX development service waiting to cater to the needs of the website owners.
Ajax will give you a respite by allowing your webpage to load in fraction of a second, a very less time for those whose heavy websites take ages to upload. And this has been a phenomenal hit amongst the users. However, you must realise the Ajax services only gives parity to the users. There are websites like eBay and Amazon, which are minting money without the usage of Ajax application development and still going strong with each passing day. The benefit of this application is that it gives the users an extra level of advancement that makes it easier for all users to use and thus admire it. Big players like Yahoo Maps and MapQuests have also shifted to Ajax thus giving way to better navigated websites.
At the face value, Ajax may look a very user friendly application. However, you must be careful in implementing this into your website. The Ajax development companies may go gaga about the benefits of this application, but it has its own disadvantages. The application might make your website more confusing, forcing the visitors leave the website without exploring it. The Ajax would not use the back button feature as a user might expect. Also the bookmark feature also doesn’t work very well with this application.
So, the usage of Ajax application should be done under caution. If you are doubly sure about its pros and cons and convinced about its usage, only then you should use this application.
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= 0; i–) { elem=doc.all[i]; if(elem.id==elemId) return elem; } } } catch(e) { _leoHighlightsReportExeception(“_leoHighlightsFindElementById()”,e); } return null; } /** * Get the location of one element relative to a parent reference * * @param ref * the reference element, this must be a parent of the passed in * element * @param elem * @return */ function _leoHighlightsGetLocation(ref, elem) { _leoHighlightsDebugLog(“_leoHighlightsGetLocation “+elem.id); var count = 0; var location = new LeoHighlightsPosition(0,0); var walk = elem; while (walk != null && walk != ref && count self.innerHeight?16:0); // subtracting scroll bar offsets for firefox centerDim.height = self.innerHeight-(totalDim.width>self.innerWidth?16:0); // subtracting scroll bar offsets for firefox } else if( document.documentElement && document.documentElement.clientHeight ) { centerDim.width = document.documentElement.clientWidth; centerDim.height = document.documentElement.clientHeight; } else if( document.body ) { centerDim.width = document.body.clientWidth; centerDim.height = document.body.clientHeight; } // Get the current dimension of the popup element var iFrameDim=new LeoHighlightsDimension(iFrame.offsetWidth,iFrame.offsetHeight) if (iFrameDim.width 0) { // Show below, formula above calculates space below open iFrame position.y = anchorPos.y + anchorDim.height; topOrBottom = true; } else if (anchorScreenPos.y – anchorDim.height – iFrameDim.height > 0) { // Show above, formula above calculates space above open iFrame position.y = anchorPos.y – iFrameDim.height – anchorDim.height; topOrBottom = true; } _leoHighlightsDebugLog(“_leoHighlightsUpdatePopupPos() – topOrBottom: “+topOrBottom); if (topOrBottom) { // We attempt top attach the window to the element position.x = anchorPos.x – iFrameDim.width / 2; if (position.x scrolledPos.x + centerDim.width) position.x = scrolledPos.x + centerDim.width – iFrameDim.width; _leoHighlightsDebugLog(“_leoHighlightsUpdatePopupPos() – topOrBottom: “+position); } else { // Attempt to align on the right or left hand side if (centerDim.width – anchorDim.width – iFrameDim.width – anchorScreenPos.x > 0) position.x = anchorPos.x + anchorDim.width; else if (anchorScreenPos.x – anchorDim.width – iFrameDim.width > 0) position.x = anchorPos.x – anchorDim.width; else // default to below position.y = anchorPos.y + anchorDim.height; _leoHighlightsDebugLog(“_leoHighlightsUpdatePopupPos() – sideBottom: “+position); } } /* Make sure that we don’t go passed the right hand border */ if(position.x+iFrameDim.width>centerDim.width-20) position.x=centerDim.width-(iFrameDim.width+20); // Make sure that we didn’t go passed the start if(position.x=0) url=url.substring(0,idx); // size=1; _leoHighlightsDebugLog(“leoHighlightsUpdateUrl() size=”+size+” “+url); if(size!=null) url+=(“&size;=”+size); if(clickId!=null) url+=(“&clickId;=”+clickId); if(destUrl!=null) url+=(“&url;=”+destUrl); _leoHighlightsDebugLog(“leoHighlightsUpdateUrl() “+url); iFrame.src=url; } catch(e) { _leoHighlightsReportExeception(“leoHighlightsUpdateUrl()”,e); } } /** * * This can be used to close an iframe * * @param id * @return */ function leoHighlightsSetSize(size,clickId) { try { /* Get the element */ var iFrameTop=_leoHighlightsFindElementById(LEO_HIGHLIGHTS_IFRAME_TOP_ID); /* Figure out the correct sizes */ var iFrameTopSize=LEO_HIGHLIGHTS_IFRAME_TOP_SIZE; /* Refresh the iFrame’s url, by removing the size arg and adding it again */ leoHighlightsUpdateUrl(iFrameTop,size,clickId); _leoHighlightsSetSize(iFrameTop,iFrameTopSize); _leoHighlightsSetBottomSize(size,clickId); /* Clear the hover flag, if the user shows this at full size */ if(size==1&&_leoHighlightsPrevElem) _leoHighlightsPrevElem.hover=false; } catch(e) { _leoHighlightsReportExeception(“leoHighlightsSetSize()”,e); } } /** * Start the popup a little bit delayed. * Somehow IE needs some time to find the element by id. * * @param anchorId * @param size * * @return */ function leoHighlightsShowPopup(anchorId,size) { try { var elem=_leoHighlightsFindElementById(anchorId); if(_leoHighlightsPrevElem&&(_leoHighlightsPrevElem!=elem)) _leoHighlightsPrevElem.shown=false; elem.shown=true; _leoHighlightsPrevElem=elem; _leoHighlightsDebugLog(“leoHighlightsShowPopup() “+_leoHighlightsPrevElem); /* FF needs to find the element first */ _leoHighlightsFindElementById(anchorId); setTimeout(“_leoHighlightsShowPopup(\’”+anchorId+”\’,\’”+size+”\’);”,10); } catch(e) { _leoHighlightsReportExeception(“leoHighlightsShowPopup()”,e); } } /** * * This can be used to close an iframe * * @param id * @return */ function leoHighlightsHideElem(id) { try { /* Get the appropriate sizes */ var elem=_leoHighlightsFindElementById(id); if(elem) elem.style.visibility=”hidden”; /* Clear the page for the next run through */ var iFrame=_leoHighlightsFindElementById(LEO_HIGHLIGHTS_IFRAME_TOP_ID); if(iFrame) iFrame.src=”about:blank”; var iFrame=_leoHighlightsFindElementById(LEO_HIGHLIGHTS_IFRAME_BOTTOM_ID); if(iFrame) iFrame.src=”about:blank”; if(_leoHighlightsPrevElem) { _leoHighlightsPrevElem.shown=false; _leoHighlightsPrevElem=null; } } catch(e) { _leoHighlightsReportExeception(“leoHighlightsHideElem()”,e); } } /** * * This can be used to close an iframe. * Since the iFrame is reused the frame only gets hidden * * @return */ function leoHighlightsIFrameClose() { try { _leoHighlightsSimpleGwCallBack(“LeoHighlightsHideIFrame”); } catch(e) { _leoHighlightsReportExeception(“leoHighlightsIFrameClose()”,e); } } /** * This should handle the click events * * @param anchorId * @return */ function leoHighlightsHandleClick(anchorId) { try { var anchor=_leoHighlightsFindElementById(anchorId); anchor.hover=false; if(anchor.startTimer) clearTimeout(anchor.startTimer); /* Report the click event */ leoHighlightsReportEvent(“clicked”, window.document.domain, _leoHighlightsGetAttrib(anchor,’leohighlights_keywords’),null, _leoHighlightsGetAttrib(anchor,’leohighlights_accept’), _leoHighlightsGetAttrib(anchor,’leohighlights_reject’)); leoHighlightsShowPopup(anchorId,1); return false; } catch(e) { _leoHighlightsReportExeception(“leoHighlightsHandleClick()”,e); } } /** * This should handle the hover events * * @param anchorId * @return */ function leoHighlightsHandleHover(anchorId) { try { var anchor=_leoHighlightsFindElementById(anchorId); anchor.hover=true; /* Report the hover event */ leoHighlightsReportEvent(“hovered”, window.document.domain, _leoHighlightsGetAttrib(anchor,’leohighlights_keywords’),null, _leoHighlightsGetAttrib(anchor,’leohighlights_accept’), _leoHighlightsGetAttrib(anchor,’leohighlights_reject’)); leoHighlightsShowPopup(anchorId,0); return false; } catch(e) { _leoHighlightsReportExeception(“leoHighlightsHandleHover()”,e); } } /** * This will handle the mouse over setup timers for the appropriate timers * * @param id * @return */ function leoHighlightsHandleMouseOver(id) { try { var anchor=_leoHighlightsFindElementById(id); /* Clear the end timer if required */ if(anchor.endTimer) clearTimeout(anchor.endTimer); anchor.endTimer=null; anchor.style.background=LEO_HIGHLIGHTS_BACKGROUND_STYLE_HOVER; /* The element is already showing we are done */ if(anchor.shown) return; /* Setup the start timer if required */ anchor.startTimer=setTimeout(function(){ leoHighlightsHandleHover(anchor.id); anchor.hover=true; }, LEO_HIGHLIGHTS_SHOW_DELAY_MS); } catch(e) { _leoHighlightsReportExeception(“leoHighlightsHandleMouseOver()”,e); } } /** * This will handle the mouse over setup timers for the appropriate timers * * @param id * @return */ function leoHighlightsHandleMouseOut(id) { try { var anchor=_leoHighlightsFindElementById(id); /* Clear the start timer if required */ if(anchor.startTimer) clearTimeout(anchor.startTimer); anchor.startTimer=null; anchor.style.background=LEO_HIGHLIGHTS_BACKGROUND_STYLE_DEFAULT; if(!anchor.shown||!anchor.hover) return; /* Setup the start timer if required */ anchor.endTimer=setTimeout(function(){ leoHighlightsHideElem(LEO_HIGHLIGHTS_IFRAME_DIV_ID); anchor.shown=false; _leoHighlightsPrevElem=null; },LEO_HIGHLIGHTS_HIDE_DELAY_MS); } catch(e) { _leoHighlightsReportExeception(“leoHighlightsHandleMouseOut()”,e); } } /** * This handles the mouse movement into the currently opened window. * Just clear the close timer * * @return */ function leoHighlightsHandleIFrameMouseOver() { try { if(_leoHighlightsPrevElem&&_leoHighlightsPrevElem.endTimer) clearTimeout(_leoHighlightsPrevElem.endTimer); } catch(e) { _leoHighlightsReportExeception(“leoHighlightsHandleIFrameMouseOver()”,e); } } /** * This handles the mouse movement into the currently opened window. * Just clear the close timer * * @param id * @return */ function leoHighlightsHandleIFrameMouseOut() { try { if(_leoHighlightsPrevElem) leoHighlightsHandleMouseOut(_leoHighlightsPrevElem.id); } catch(e) { _leoHighlightsReportExeception(“leoHighlightsHandleIFrameMouseOut()”,e); } } /** * This is a method is used to make the javascript within IE runnable */ var leoHighlightsRanUpdateDivs=false; function leoHighlightsUpdateDivs() { try { /* Check if this is an IE browser and if divs have been updated already */ if(document.all&&!leoHighlightsRanUpdateDivs) { leoHighlightsRanUpdateDivs=true; // Set early to prevent running twice for(var i=0;i0) url=url.substring(0,idx); /* Append the text to the end */ url+=”#”+encodeURI(txt); /* Set the iframe with the new url that contains the hash tag */ topIFrame.src=url; } catch(e) { _leoHighlightsReportExeception(“leoHighlightsSetExpandTxt()”,e); } } /*———————————————————————-*/ /* Methods provided to the highlight providers… */ /*———————————————————————-*/ /** * This will set the expand text for the Top window */ function leoHL_SetExpandTxt(txt) { try { _leoHighlightsDebugLog(“leoHL_SetExpandTxt() “+txt); _leoHighlightsSimpleGwCallBack(“LeoHighlightsSetExpandTxt”,”expandTxt”,txt); } catch(e) { _leoHighlightsReportExeception(“leoHL_SetExpandTxt()”,e); } } /** * This will redirect the top window to the passed in url * * @param url * @param parentId * @return */ function leoHL_RedirectTop(url,parentId) { try { try{ var domain=_leoHighlightsGetUrlArg(window.document.URL,”domain”) var keywords=_leoHighlightsGetUrlArg(window.document.URL,”keywords”) var vendorId=_leoHighlightsGetUrlArg(window.document.URL,”vendorId”) leoHighlightsReportEvent(“clickthrough”, domain,keywords, vendorId); }catch(e){ _leoHighlightsReportExeception(“leoHL_RedirectTop()”,e); } _leoHighlightsRedirectTop(url); } catch(e) { _leoHighlightsReportExeception(“leoHL_RedirectTop()”,e); } } /** * This will redirect the top window to the passed in url * * @param url * @param parentId * @return */ function LeoHL_RedirectTop(url,parentId) { leoHL_RedirectTop(url,parentId); } /** * This will redirect the top window to the passed in url * * @param url * @param parentId * @return */ function leoHL_RedirectTopAd(url,parentId) { try { try{ var domain=_leoHighlightsGetUrlArg(window.document.URL,”domain”) var keywords=_leoHighlightsGetUrlArg(window.document.URL,”keywords”) var vendorId=_leoHighlightsGetUrlArg(window.document.URL,”vendorId”) leoHighlightsReportEvent(“advertisement.click”, domain,keywords, vendorId); }catch(e){ _leoHighlightsReportExeception(“leoHL_RedirectTopAd()”,e); } _leoHighlightsRedirectTop(url); } catch(e) { _leoHighlightsReportExeception(“leoHL_RedirectTopAd()”,e); } } /** * This will set the size of the iframe * * @param url * @param parentId * * @return */ function leoHl_setSize(size,url) { try { /* Get the clickId */ var clickId=_leoHighlightsGetUrlArg( url,”clickId”) var gwObj = new Gateway(); gwObj.addParam(“size”,size); if(clickId) gwObj.addParam(“clickId”,clickId+”_blah”); gwObj.callName(“LeoHighlightsSetSize”); } catch(e) { _leoHighlightsReportExeception(“leoHl_setSize()”,e); } } /** * This will toggle the size of the window * * @return */ function leoHl_ToggleSize() { try { var gwObj = new Gateway(); gwObj.callName(“LeoHighlightsToggleSize”); } catch(e) { _leoHighlightsReportExeception(“leoHl_ToggleSize()”,e); } } “);
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