New Frequently Asked Questions
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- FAQ 1700 How can I create a single frame frameset?
- FAQ 1701 How can I get the value of a text input field without using the name of the field?
- FAQ 1702 How can I use an external JavaScript source file to amend all the mailto links in a document such that it appends a generic subject line?
- FAQ 1703 How can I clear the contents of one frame from another?
- FAQ 1704 How can I performance test JavaScript?
- FAQ 1705 Can I submit a form in a parent window by clicking a submit button in a child window?
- FAQ 1706 How can I randomly open one of 100 windows named 1.htm to 100.htm?
- FAQ 1707 How can I completely hide a frame in all browsers?
- FAQ 1708 How can I pass the value of a hidden field into a confirm dialog box when the submit button is pressed, so I can ask the user if they really want to edit/remove the visible version of the hidden value?
- FAQ 1709 How can I use the main windows scrollbars to scroll the contents of an inline frame?
- FAQ 1710 How do I ensure that a form field contains a .gov domain (whether that be .gov, .gov.uk etc)?
- FAQ 1711 How can set the focus in a form field in a absolutelty positioned layer?
- FAQ 1712 How can I disable a group of radio buttons?
- FAQ 1713 How can I send the submission of an from to an email address or a URL depending of the status of a checkbox?
- FAQ 1714 How can I resize the opener of a popup window?
- FAQ 1715 How can I concatenate two values from two select lists to the URL associated with a clicked image map?
- FAQ 1716 How can I detect when the opener of a popup window has changed?
- FAQ 1717 How do I check that text entered in a text form field is an integer?
- FAQ 1718 How can I reject a form submission if one of any number of validate functions returns false?
- FAQ 1719 How can I populate a list of text form fields from the selected options in a multiple select list?
- FAQ 1720 How can I copy the contents pf a text input form field when the user changes its value to a hidden form field in a different form on the same page?
- FAQ 1721 How can I round up a number to the nearest 0.5?
- FAQ 1722 How can I force an unclicked link to look as though it had been clicked?
- FAQ 1723 How can I redirect to another page depending on how many checkboxes have been checked?
- FAQ 1724 How can I dynamically display text underneath an image using an image map and on mouse over events?
- FAQ 1725 How do I avoid the main window displaying [object] when I click on a hypertext link to open a new popup window?
- FAQ 1726 How can I count of number of instances of a particular word or character in a string?
- FAQ 1727 How can I hint to the user that I want a password enter into a text field, and then when the user enters text into the field it turns into a password field?
- FAQ 1728 How can I show the dates for the last two weeks in a select form field?
- FAQ 1729 How can I uncheck all radio boxes within a group of radio boxes?
- FAQ 1730 How can I remove options from a select list based either on the text property value or the value property value?
- FAQ 1731 Is there a way of shifting the contents of an array down / up e.g. 1 becomes 2, 2 becomes 3 etc?
- FAQ 1732 How can I display an absolutely positioned layer of content over form fields so that the form fields do not show through the layer?
- FAQ 1733 How do you dynamically write a form field to a layer so Netscape displays it?
- FAQ 1734 How can I display something on the page if JavaScript is disabled without first testing from another page?
- FAQ 1735 How can an imagemap capture the focus when the mouse moves over a hotspot?
- FAQ 1736 Why does document.myForm.submit() not work or return an error?
- FAQ 1737 On Netscape 4.0 & 4.6 for the Mac resizing the window will break all of your hyperlinks' onClick actions
- FAQ 1738 How can a function in one *.js file call another function in a second *.js file?
- FAQ 1739 How can I make the page longer, or the vertical scroll bar appear when I dynamically populate a layer with lots of content in Netscape Navigator 4?
- FAQ 1740 How can I filter user input to leave just the numerical digits?
- FAQ 1741 Is it possible to put a scrollbar to a select drop down list?
- FAQ 1742 Can you simulate a click on an <input type="file"> button?
- FAQ 1743 When placing the value of a JavaScript variable into a URL request, how do I correctly format the variable value, so that spaces etc are converted into the standard html request syntax?
- FAQ 1744 How can cross-hairs follow the mouse pointer over an image or set of images?
- FAQ 1745 How can an image slide across the top of images when the mouse pointer moves across the same images?
- FAQ 1746 Is it possible to secure web pages using JavaScript?
- FAQ 1747 How can I change the HREF attribute of a link when a form button is clicked?
- FAQ 1748 Netscape Navigator 4 loses the onMouseDown event handlers after a window resize
- FAQ 1749 How can I assign five substrings of a larger string to the variables named str1, str2... to str5?
- FAQ 1750 How do I test the equality of two strings?
- FAQ 1751 Why do animated GIFs stop animating when I click on a link, and how can I avoid this?
- FAQ 1752 Can JavaScript use newline characters to format the output?
- FAQ 1753 How do you determine if a variable exists?
- FAQ 1754 How can I execute a function every 10 seconds?
- FAQ 1755 How can I stop my HTML code from being viewed?
- FAQ 1756 How can I send email from a form that works also with Outlook/Outlook Express?
- FAQ 1757 How can I define my own mouse cursor for the Internet Explorer using my own *.ico file?
- FAQ 1758 How do I know which frame has the focus?
- FAQ 1759 How can I create an option in a select statement with a particular style?
- FAQ 1760 How can you format numbers as right-aligned in a text field?
- FAQ 1761 How can I close the current popup window's opener?
- FAQ 1762 How do I password protect a directory or file using .htaccess in a form and encrypt the password in the address bar?
- FAQ 1763 How can I reduce the spacing between paragraphs?
- FAQ 1764 How do you hide your Web server's identity from potential hackers?
- FAQ 1765 How do you check if a date is valid?
- FAQ 1766 How do I avoid the "close window" message?
- FAQ 1767 How do you check to see if a string is contained within a list of strings?
- FAQ 1768 How can I accesss the CGI variable REMOTE_USER from JavaScript?
- FAQ 1769 How to avoid the confirmation dialog box when closing a window in Internet Explorer?
- FAQ 1770 How can I disable the back button and prevent other users/hackers from viewing the private pages of the (site/contents) of a user who has logged out?
- FAQ 1771 How can you force the current window to close after opening a popup window?
- FAQ 1772 How can I store a file on the client side and read it from my page?
- FAQ 1773 Given a start date and a number of days can you calculate the end date?
- FAQ 1774 How can I Enhance IIS?
- FAQ 1775 On a form with multiple Submit buttons and input fields, how to you choose which one is pressed when the Enter key is hit?
- FAQ 1776 Is it possible to make a pop-up window automatically resize to fit all the text and images contained in a page?
- FAQ 1777 Is there a way to have a window self focus but still allow the user to enter data into a form?
- FAQ 1778 Re: How do I check if an image file exists?
- FAQ 1779 Can I pass JavaScript variables to a CGI Perl program?
- FAQ 1780 How can I highlight normal text using onMouseover?
- FAQ 1781 How to make a collapsible treeview applet with JavaScript?
- FAQ 1782 Q475 Is it possible to pop-up a window the same size as the image it contains?
- FAQ 1783 Are Pop-Up Windows Legally and Morally Proper?
- FAQ 1784 Can I create a link without having a hand pointer?
- FAQ 1785 How do I prevent a form from being submitted when I press the ENTER key?
- FAQ 1786 If I use a button to create a pop-up screen with links, how do I get the links to open in the orginal main window, creating frames and make the pop-up disappear?
- FAQ 1787 How can I specify the width of a form select field?
- FAQ 1788 How do I really force a real reload of the parent window when closing a child without having to mess with annoying frames?
- FAQ 1789 Is there a way I can de-activate a submit button after it's been hit by the user, so that in the same session, the user can't use the button again?
- FAQ 1790 Why does the server not receive all input from select-option inputs?
- FAQ 1791 How can I detect the browser close event?
- FAQ 1792 How do you center a layer in IE?
- FAQ 1793 How do I make an explanation appear when my mouse pointer hovers over a word?
- FAQ 1794 How to detect the type of connection (modem/cable/router) of a web browser?
- FAQ 1795 How can I allow the user to combine one option from radio buttons and one option from list and then press submit button to open respective selected webpage??
- FAQ 1796 How do I stop a form from being submitted more than once
- FAQ 1797 How do I add another statement to an onSubmit validation when it already has one?
- FAQ 1798 How can I automatically format a date like 1/5/01 while it is being typed in by the user?
- FAQ 1799 do you have any neat tricks to capture the current page's source?
- FAQ 1800 How do you control the mouse pointer?
- FAQ 1801 How can I resize an image
- FAQ 1802 How to make sure a user enters percentage correctly like 88.66 and not 8888 or 888.6..?
- FAQ 1803 Why won't the form submit() method work?
- FAQ 1804 How do I always popup a window in the center of the parent window regardless of where the parent window is?
- FAQ 1805 How can I take "wrapped" text from a form's input field, and at some event of my chosing, double-space it?
- FAQ 1806 How would I determine if the visitor's platform is either a Mac or a Windows machine and send them to the appropriate directory on my server?
- FAQ 1807 How do I get a child window to close after clicking on a link that opens in the parent window?
- FAQ 1808 Can I use a scrollbar to change a variable?
- FAQ 1809 How do I make a modal window?
- FAQ 1810 How can I disable the back button?
©2018 Martin Webb