|By Charlie Arehart||
|January 1, 2002 12:00 AM EST||
For both audiences there's still value in learning at least a minimal amount about client-side scripting. Even learning about just one feature - setting the cursor on the first form field you may have - can bring measurable benefit to your site visitors.
Where's Your Focus?
Here's the motivation for the problem I want to solve: you visit a Web site that offers a form inviting you to enter some input. No big deal - we see them all the time, right? Now, how do you get to the point of entering data into that first field?
Do you use your mouse to move the cursor to that first data entry area? Or are you a keyboard maven, like me, in which case you prefer to tab to such a field? The problem is you may have to hit the tab key several times before you can enter data.
Indeed, it's typical to visit sites with navigational toolbars across the top and/or left side of the form, forcing you to tab dozens and dozens of times. It's an annoyance, especially if visitors to your site know the site designer could have easily prevented the problem.
If you think that's being pedantic, consider a simpler example. If you show users a page that clearly is expecting them to enter some data (perhaps a user ID or a search argument, etc.) before proceeding, why not put the cursor right on the data entry field rather than forcing them to use the mouse or keyboard to get there. It's a usability issue.
Laying the Foundation
Gimme the Goods
Focus on Forms
Enter Userid: <INPUT TYPE="text" Name="UserId">
What's in a Name?
There are two ways to do this: we can refer to the form by name or by indicating the relative location of the form on the page. Which is appropriate for you depends on your situation. If you've specified a NAME attribute on the <FORM> tag, you'd use that name.
If we had specified NAME="Login" on the <FORM> tag, we would refer to the form field as Login.Userid. But we're not done yet. The form itself occurs within the Web page, and while it might not seem necessary, the contents of the page are considered to be within the "document" on the page (again, recall the "Document" Object Model). We finally have the complete means by which to refer to the field: document.Login.UserId.
Before leaving this subject, let's clarify that if you haven't named your form, you can still refer to it by indicating the relative location of the form within the document. There's a special "forms" array in every Web page document, so if you have only one form in yours, you would indicate it as the first form.
Notice that this isn't used as "form" but as "forms". It's a subtle point, but if it's not specified correctly, you'll receive an error.
We're on the Case
Similarly, since we named the form field UserId, we must refer to it exactly that way. If we referred to it as document.forms.userid, or even document.forms.Userid, we'd receive an error either way.
Forcing the Focus()
To set the focus we use the focus method just like a reference to an object's method in Java. To set the focus for our form field called "UserId", we might specify it as:
That's about it. There's nothing to be specified within the parentheses. (Notice that the word focus is also all lowercase.) This statement, when executed, will cause the named field in the named form to receive the focus when the page is displayed to the user. In other words, the cursor will be resting on that field when the page is loaded.
<!-- document.forms.UserId.focus() //--> </SCRIPT>
Experienced developers may prefer yet another approach: creating a function instead and calling that function in the ONLOAD.
But Will It Fail?
You should have no trouble if you:
- Refer to the form field using the naming references indicated.
- Remember to specify the proper case for the naming reference.
- Ensure that the statement occurs only after the form has been loaded.
Should you go ahead and add the focus method for the first input field of the forms in all your pages? Well, first it may not be appropriate to the interface. On some pages the form and its input fields may not really be the focus of the page. Consider a page that happens to have a search field on it, such as http://industry.java.sun.com/solutions/ (see Figure 1).
If you look closely at the top right corner, there is indeed a "form" on this page for searching the site, but it's definitely not the focus of the page. There's also a search field to "Find a Solution" on the right-hand side. Should we put the focus in the first form field? The second? Either? Maybe neither. If you put it on the second, which may seem a focus of the page, keyboard users would find that tabbing once wouldn't take them to the top nav bar but instead to the links under that search field. That's not good usability, either.
Another reason not to blindly set the focus on any first form on the page is if the form doesn't appear at the top of the page. If we did that, an unintended result would be that the screen would be scrolled down when displayed, so that the field with focus (that form input field) was visible. This may cause the top of the page to be hidden from the user. Remember, too, that users often have different (and lower resolution) monitors than developers, increasing the chances of this problem developing. It can also happen if the users don't maximize their screen when displaying your page.
When would it be appropriate to put the focus on a field? When the form is clearly the focus of the page. Going back to the previous example at Sun's Solutions Marketplace, consider the link under that "Find a Solution" button, labeled "Enroll Your Company." On the page that will be shown, it prompts for Company Name. That's clearly the focus of the page, so putting the focus on that field would make sense (sadly, they're not setting the focus using this approach as of this writing).
If you visit www.altavista.com, a popular search engine, you'll see that searching is clearly the focus of the page, and they do indeed use the focus method so that you can start typing search criteria as soon as the page appears.
Another natural example, and one that nearly all developers end up dealing with, is a login page that's presented to enter a site or access secured areas. If the user can't proceed without entering a user ID/password and the prompt for this is the only reason the page is being presented, there's little reason not to set the focus on the UserId field.
Afterword: Using SCRIPTJ in JRun Studio
There's one last useful trick that will be of interest to users of JRun Studio (a similar feature may exist in other IDEs). It also works in its sister Macromedia products, ColdFusion Studio and HomeSite.
You could hope to remember to enter that properly formatted set of basic tags:
|Fernando 01/09/02 06:25:00 PM EST|
It is surprising sometimes how we forget about trying to releave the work load to servers. For example for form validation it becomes useful as it releases stress put on the server..Let the client check for its own mess before the server does :)
|Satish 01/09/02 12:46:00 AM EST|
This article by Charles Arehart on Java Script made me to refresh the most basic and useful concepts.
thanks a lot, regards
You think you know what’s in your data. But do you? Most organizations are now aware of the business intelligence represented by their data. Data science stands to take this to a level you never thought of – literally. The techniques of data science, when used with the capabilities of Big Data technologies, can make connections you had not yet imagined, helping you discover new insights and ask new questions of your data. In his session at @ThingsExpo, Sarbjit Sarkaria, data science team lead ...
Jul. 30, 2016 05:00 PM EDT Reads: 1,292
WebRTC is bringing significant change to the communications landscape that will bridge the worlds of web and telephony, making the Internet the new standard for communications. Cloud9 took the road less traveled and used WebRTC to create a downloadable enterprise-grade communications platform that is changing the communication dynamic in the financial sector. In his session at @ThingsExpo, Leo Papadopoulos, CTO of Cloud9, discussed the importance of WebRTC and how it enables companies to focus...
Jul. 30, 2016 04:30 PM EDT Reads: 1,116
"My role is working with customers, helping them go through this digital transformation. I spend a lot of time talking to banks, big industries, manufacturers working through how they are integrating and transforming their IT platforms and moving them forward," explained William Morrish, General Manager Product Sales at Interoute, in this SYS-CON.tv interview at 18th Cloud Expo, held June 7-9, 2016, at the Javits Center in New York City, NY.
Jul. 30, 2016 04:30 PM EDT Reads: 2,269
SYS-CON Events announced today that 910Telecom will exhibit at the 19th International Cloud Expo, which will take place on November 1–3, 2016, at the Santa Clara Convention Center in Santa Clara, CA. Housed in the classic Denver Gas & Electric Building, 910 15th St., 910Telecom is a carrier-neutral telecom hotel located in the heart of Denver. Adjacent to CenturyLink, AT&T, and Denver Main, 910Telecom offers connectivity to all major carriers, Internet service providers, Internet backbones and ...
Jul. 30, 2016 01:30 PM EDT Reads: 972
SYS-CON Events announced today that LeaseWeb USA, a cloud Infrastructure-as-a-Service (IaaS) provider, will exhibit at the 19th International Cloud Expo, which will take place on November 1–3, 2016, at the Santa Clara Convention Center in Santa Clara, CA. LeaseWeb is one of the world's largest hosting brands. The company helps customers define, develop and deploy IT infrastructure tailored to their exact business needs, by combining various kinds cloud solutions.
Jul. 30, 2016 11:30 AM EDT Reads: 1,404
For basic one-to-one voice or video calling solutions, WebRTC has proven to be a very powerful technology. Although WebRTC’s core functionality is to provide secure, real-time p2p media streaming, leveraging native platform features and server-side components brings up new communication capabilities for web and native mobile applications, allowing for advanced multi-user use cases such as video broadcasting, conferencing, and media recording.
Jul. 30, 2016 10:45 AM EDT Reads: 1,120
SYS-CON Events announced today that Venafi, the Immune System for the Internet™ and the leading provider of Next Generation Trust Protection, will exhibit at @DevOpsSummit at 19th International Cloud Expo, which will take place on November 1–3, 2016, at the Santa Clara Convention Center in Santa Clara, CA. Venafi is the Immune System for the Internet™ that protects the foundation of all cybersecurity – cryptographic keys and digital certificates – so they can’t be misused by bad guys in attacks...
Jul. 30, 2016 10:15 AM EDT Reads: 1,518
ReadyTalk has expanded the capabilities of the FoxDen collaboration platform announced late last year to include FoxDen Connect, an in-room video collaboration experience that launches with a single touch. With FoxDen Connect, users can now not only engage in HD video conferencing between iOS and Android mobile devices or Chrome browsers, but also set up in-person meeting rooms for video interactions. A host’s mobile device automatically recognizes the presence of a meeting room via beacon tech...
Jul. 30, 2016 10:00 AM EDT Reads: 545
The cloud market growth today is largely in public clouds. While there is a lot of spend in IT departments in virtualization, these aren’t yet translating into a true “cloud” experience within the enterprise. What is stopping the growth of the “private cloud” market? In his general session at 18th Cloud Expo, Nara Rajagopalan, CEO of Accelerite, explored the challenges in deploying, managing, and getting adoption for a private cloud within an enterprise. What are the key differences between wh...
Jul. 30, 2016 10:00 AM EDT Reads: 2,182
It’s 2016: buildings are smart, connected and the IoT is fundamentally altering how control and operating systems work and speak to each other. Platforms across the enterprise are networked via inexpensive sensors to collect massive amounts of data for analytics, information management, and insights that can be used to continuously improve operations. In his session at @ThingsExpo, Brian Chemel, Co-Founder and CTO of Digital Lumens, will explore: The benefits sensor-networked systems bring to ...
Jul. 30, 2016 09:15 AM EDT Reads: 1,660
On Dice.com, the number of job postings asking for skill in Amazon Web Services increased 76 percent between June 2015 and June 2016. Salesforce.com saw its own skill mentions increase 37 percent, while DevOps and Cloud rose 35 percent and 28 percent, respectively. Even as they expand their presence in the cloud, companies are also looking for tech professionals who can manage projects, crunch data, and figure out how to make systems run more autonomously. Mentions of ‘data science’ as a skill ...
Jul. 30, 2016 09:00 AM EDT Reads: 624
Manufacturers are embracing the Industrial Internet the same way consumers are leveraging Fitbits – to improve overall health and wellness. Both can provide consistent measurement, visibility, and suggest performance improvements customized to help reach goals. Fitbit users can view real-time data and make adjustments to increase their activity. In his session at @ThingsExpo, Mark Bernardo Professional Services Leader, Americas, at GE Digital, discussed how leveraging the Industrial Internet a...
Jul. 30, 2016 08:00 AM EDT Reads: 790
Amazon has gradually rolled out parts of its IoT offerings in the last year, but these are just the tip of the iceberg. In addition to optimizing their back-end AWS offerings, Amazon is laying the ground work to be a major force in IoT – especially in the connected home and office. Amazon is extending its reach by building on its dominant Cloud IoT platform, its Dash Button strategy, recently announced Replenishment Services, the Echo/Alexa voice recognition control platform, the 6-7 strategic...
Jul. 30, 2016 07:45 AM EDT Reads: 734
In addition to all the benefits, IoT is also bringing new kind of customer experience challenges - cars that unlock themselves, thermostats turning houses into saunas and baby video monitors broadcasting over the internet. This list can only increase because while IoT services should be intuitive and simple to use, the delivery ecosystem is a myriad of potential problems as IoT explodes complexity. So finding a performance issue is like finding the proverbial needle in the haystack.
Jul. 30, 2016 07:45 AM EDT Reads: 2,421
There will be new vendors providing applications, middleware, and connected devices to support the thriving IoT ecosystem. This essentially means that electronic device manufacturers will also be in the software business. Many will be new to building embedded software or robust software. This creates an increased importance on software quality, particularly within the Industrial Internet of Things where business-critical applications are becoming dependent on products controlled by software. Qua...
Jul. 30, 2016 07:30 AM EDT Reads: 1,698
Big Data, cloud, analytics, contextual information, wearable tech, sensors, mobility, and WebRTC: together, these advances have created a perfect storm of technologies that are disrupting and transforming classic communications models and ecosystems. In his session at @ThingsExpo, Erik Perotti, Senior Manager of New Ventures on Plantronics’ Innovation team, provided an overview of this technological shift, including associated business and consumer communications impacts, and opportunities it ...
Jul. 30, 2016 07:30 AM EDT Reads: 558
The 19th International Cloud Expo has announced that its Call for Papers is open. Cloud Expo, to be held November 1-3, 2016, at the Santa Clara Convention Center in Santa Clara, CA, brings together Cloud Computing, Big Data, Internet of Things, DevOps, Digital Transformation, Microservices and WebRTC to one location. With cloud computing driving a higher percentage of enterprise IT budgets every year, it becomes increasingly important to plant your flag in this fast-expanding business opportuni...
Jul. 30, 2016 05:15 AM EDT Reads: 2,723
IoT is rapidly changing the way enterprises are using data to improve business decision-making. In order to derive business value, organizations must unlock insights from the data gathered and then act on these. In their session at @ThingsExpo, Eric Hoffman, Vice President at EastBanc Technologies, and Peter Shashkin, Head of Development Department at EastBanc Technologies, discussed how one organization leveraged IoT, cloud technology and data analysis to improve customer experiences and effi...
Jul. 30, 2016 04:00 AM EDT Reads: 2,154
The Internet of Things will challenge the status quo of how IT and development organizations operate. Or will it? Certainly the fog layer of IoT requires special insights about data ontology, security and transactional integrity. But the developmental challenges are the same: People, Process and Platform. In his session at @ThingsExpo, Craig Sproule, CEO of Metavine, demonstrated how to move beyond today's coding paradigm and shared the must-have mindsets for removing complexity from the develo...
Jul. 30, 2016 03:00 AM EDT Reads: 1,672
SYS-CON Events announced today that MangoApps will exhibit at the 19th International Cloud Expo, which will take place on November 1–3, 2016, at the Santa Clara Convention Center in Santa Clara, CA. MangoApps provides modern company intranets and team collaboration software, allowing workers to stay connected and productive from anywhere in the world and from any device.
Jul. 30, 2016 02:45 AM EDT Reads: 1,508