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Webmaster Forum / HTML, CSS, Scripts / JavaScript / March 2005New to Javascript
I am new to javascript. I used the code below in Netscape 7.0 and in IE 6.0. The Javascript portion does not render in Netscape , but it does show in IE. Can someone explain why? Any helpful insight would be appreciated. <!DOCTYPE HTML PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"> <html xmlins="http://www.w3.org/1999/xhtml"> <head> <title>Java Script Test</title> </head> <body bgcolor="#FFFFF"> <h1> What is your problem </h1> <script language="javascript" type="text javascript"> <!-- Hide script from old browsers document.write("<h1> Today is </h1>") // End hiding script from old broswers --> </script> </body> </html> JSNewbie wrote on 29 mrt 2005 in comp.lang.javascript: > I am new to javascript. I used the code below in Netscape 7.0 and in > IE 6.0. The Javascript portion does not render in Netscape , but it [quoted text clipped - 7 lines] > </head> > <body bgcolor="#FFFFF"> Better [get ]use[d to] CSS White is default anyway > <h1> What is your problem > </h1> > <script language="javascript" language="javascript" is depriciated, don't use > type="text javascript"> > <!-- Hide script from old browsers <!-- is depriciated for this use for more than 5 years, don't use > document.write("<h1> Today is </h1>") no problemo!!! > // End hiding script from old broswers --> see above > </script> > </body> > </html> Probably javascript switched off in the N7 broswer(?)  SignatureEvertjan. The Netherlands. (Replace all crosses with dots in my emailaddress) > JSNewbie wrote > > <body bgcolor="#FFFFF"> > > Better [get ]use[d to] CSS > White is default anyway Not true. I know a machine where the default is gray, and another where the default on white text on blue. So another tip: if specifying a backgroundcolour, you should explicitly set the foreground too. > > <!-- Hide script from old browsers > > <!-- is depriciated for this use for more than 5 years, don't use That has been said before in this newsgroup, but I 'm wondering why even sites like Google and Altavista still cloak comment their scripts like this. -- Ivo [not use "<!-- hide from old browsers"] > That has been said before in this newsgroup, but I 'm wondering why even > sites like Google and Altavista still cloak comment their scripts like this. Because it's voodoo. You can add it, and it doesn't hurt you, so why change anything that once worked. The problem is that it can hurt you if you use XHTML. An XML processor is free to remove comments before processing the rest, inside any element, so it could remove your script contents. Browsers probably won't do that, but if you use XHTML, it should be because you expect to use other tools on it (browsers are fine with HTML, IE doesn't even treat XHTML as XML, but only as malformed HTML). Any browser that understands the script tag, even those that don't understand its contents, will not need "<!--". That's pretty much any browser since Netscape 2. /L SignatureLasse Reichstein Nielsen - lrn@hotpop.com DHTML Death Colors: <URL:http://www.infimum.dk/HTML/rasterTriangleDOM.html> 'Faith without judgement merely degrades the spirit divine.' > JSNewbie wrote on 29 mrt 2005 in comp.lang.javascript: > >> I am new to javascript. I used the code below in Netscape 7.0 and in >> IE 6.0. The Javascript portion does not render in Netscape , but it >> does show in IE. >> <!DOCTYPE HTML PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"> >> <html xmlins="http://www.w3.org/1999/xhtml"> Should be: <html xmlns="... >> <head> >> <title>Java Script Test</title> [quoted text clipped - 3 lines] > Better [get ]use[d to] CSS > White is default anyway Agree on using CSS. Using XHTML with old, deprecated presentational tags is mixing styles. It won't lead to anything good. White is not the default background (not even in IE). The default is the operating system's default window background, which on my computer is slightly yellow. If you mean white, do use it. However, what is written is not white. It needs another "F" to become "#FFFFFF". >> <h1> What is your problem >> </h1> >> <script language="javascript" > > language="javascript" is depriciated, don't use It's "deprecated", but it means almost the same :) >> type="text javascript"> This should be type="text/javascript"> I think this is what is causing your problem. So, in total: <script type="text/javascript"> is the way to start a script tag. >> <!-- Hide script from old browsers > > <!-- is depriciated for this use for more than 5 years, don't use It's not deprecated as an HTML comment, but it is correct that it is not needed inside a script element. The "old browsers" that it is supposed to hide the script from were succeeded by the generation of browsers starting with Netscape 2, around 1996. /L SignatureLasse Reichstein Nielsen - lrn@hotpop.com DHTML Death Colors: <URL:http://www.infimum.dk/HTML/rasterTriangleDOM.html> 'Faith without judgement merely degrades the spirit divine.' Lasse Reichstein Nielsen wrote on 29 mrt 2005 in comp.lang.javascript: >> language="javascript" is depriciated, don't use > > It's "deprecated", but it means almost the same :) Your correction is apprecated, I pray, Lasse! =========== M-W: Main Entry: dep·re·cate Etymology: Latin deprecatus, past participle of deprecari to avert by prayer, from de- + precari to pray Main Entry: ap·pre·ci·ate Etymology: Late Latin appretiatus, past participle of appretiare, from Latin ad- + pretium price SignatureEvertjan. The Netherlands. (Replace all crosses with dots in my emailaddress) > I am new to javascript. I used the code below in Netscape 7.0 and in > IE 6.0. The Javascript portion does not render in Netscape , but it [quoted text clipped - 19 lines] > </body> > </html> The DOCTYPE is incomplete, and it should have "html" instead of "HTML". The namespace property is spelled "xmlns", not "xmlins". Forcing the body background color only is bad practice, because you don't know what the user's default are. Either set all the colors or leave them alone. The "language" property of the "script" element is obsolete. The MIME type for JavaScript is "text/javascript", not "text javascript". Using <!-- ... --> is obsolete. document.write does not work with XHTML (and isn't supposed to). Use the DOM model. <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <title>Java Script Test</title> </head> <body> <h1> What is your problem</h1> <script type="text/javascript"> var body = document.getElementsByTagName("body")[0]; var h1 = document.createElement("h1"); h1.appendChild (document.createTextNode (" Today is ")); body.appendChild (h1); </script> </body> </html> SignatureJohn W. Kennedy "Compact is becoming contract, Man only earns and pays." -- Charles Williams. "Bors to Elayne: On the King's Coins" > I am new to javascript. I used the code below in Netscape 7.0 and in > IE 6.0. The Javascript portion does not render in Netscape , but it [quoted text clipped - 7 lines] > </head> > <body bgcolor="#FFFFF"> No such colour... Mick > <h1> What is your problem > </h1> [quoted text clipped - 8 lines] > </body> > </html> |
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