isNum
in [JavaScript]
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From: Rick on 20 Mar 2005 23:09 I have been trying to get this code to work and the isNum seem to be giving me a problem and I just cannot figure it out any help would me very much appreciated!! Thanks in advance!!! function SubmitSame() { var usernew, QPSQTY, PTPS, PSSQTY, PSST, ECQTY, ECT, EXQTY, EXT, INQTY, INTA, SKQTY, SKT, CSQTY, CST, total, result, result1, result2, result3, result4, result5, result6, result0; if (document.getElementById) { usernew = document.getElementById('usernew'); QPSQTY = document.getElementById('QPSQTY'); PTPS = document.getElementById('PTPS'); PSSQTY = document.getElementById('PSSQTY'); PSST = document.getElementById('PSST'); ECQTY = document.getElementById('ECQTY'); ECT = document.getElementById('ECT'); EXQTY = document.getElementById('EXQTY'); EXT = document.getElementById('EXT'); INQTY = document.getElementById('INQTY'); INTA = document.getElementById('INTA'); SKQTY = document.getElementById('SKQTY'); SKT = document.getElementById('SKT'); CSQTY = document.getElementById('CSQTY') CST = document.getElementById('CST'); total = document.getElementById('total'); } else { usernew = document.usernew; QPSQTY = usernew.QPSQTY; PTPS = usernew.PTPS; PSSQTY = usernew.PSSQTY; PSST = usernew.PSST; ECQTY = usernew.ECQTY; ECT = usernew.ECT; EXQTY = usernew.EXQTY; EXT = usernew.EXT; INQTY = usernew.INQTY; INTA = usernew.INTA; SKQTY = usernew.SKQTY; SKT = usernew.SKT; CSQTY = usernew.CSQTY; CST = usernew.CST; total = usernew.total; } if (!isNum(QPSQTY.value)) { return ; } }
From: Fred Oz on 21 Mar 2005 00:06 Rick wrote: > I have been trying to get this code to work and the isNum seem to be giving > me a problem and I just cannot figure it out any help would me very much > appreciated!! > [...] > } > if (!isNum(QPSQTY.value)) { > return ; } > } I think you are confused with isNaN(), which returns true if the argument is not a number. isNaN(QPSQTY.value) will return true if the text entered into QPSQTY is not a number. Here, play with this: <input type="text" value="6" onblur=" document.getElementById('xx').innerHTML = this.value + ' isNaN? : ' + isNaN(this.value); "> <span id="xx"></span> e.g. 23e345 *is* a valid number and will return false. .23 is a valid number and will return false. 123qwe is not a valid number and will return true. -- Fred
From: Rick on 21 Mar 2005 01:40 Wow that worked perfect. What is the isNum for? Thanks you very much!!! "Fred Oz" <OzFred(a)iinet.net.auau> wrote in message news:KDs%d.440$Zn.26430(a)news.optus.net.au... > Rick wrote: >> I have been trying to get this code to work and the isNum seem to be >> giving >> me a problem and I just cannot figure it out any help would me very much >> appreciated!! >> > [...] >> } >> if (!isNum(QPSQTY.value)) { >> return ; } >> } > > I think you are confused with isNaN(), which returns true if the > argument is not a number. > > isNaN(QPSQTY.value) > > will return true if the text entered into QPSQTY is not a > number. Here, play with this: > > <input type="text" value="6" onblur=" > document.getElementById('xx').innerHTML = > this.value + ' isNaN? : ' + isNaN(this.value); > "> > <span id="xx"></span> > > > e.g. 23e345 *is* a valid number and will return false. > .23 is a valid number and will return false. > 123qwe is not a valid number and will return true. > > > > -- > Fred
From: Fred Oz on 21 Mar 2005 02:13 Rick wrote: > Wow that worked perfect. > > What is the isNum for? Nothing. > > Thanks you very much!!! You're welcome. [...] As a tip, here is a better way of doing what you are doing. It does two things: Puts your variables into objects, one for text one for numbers, and uses the forms collection to avoid using getElementById. You could include the DynWrite[1] function to provide getElementById for those browsers that support document.all, but I think the forms collection is simpler (assuming that you are using a form...) The function I've written just changes the style of a form element depending on whether isNaN returns true or false, hardly an exhaustive test of whether the input really is a number but illustrative anyway. I could have done the isNaN test when reading the values, but that wouldn't show getting the values back from the object. 1. <URL:http://www.jibbering.com/faq/faq_notes/alt_dynwrite.html> <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd"> <html><head> <title>Mod Style Play</title> <meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1"> <style type="text/css"> ..isText {font-weight: normal; color: blue;} ..isNumber {font-weight: bold; color: red;} </style> <script type="text/JavaScript"> function SubmitSame(theForm) { // Just a guess, but are these the names // of inputs in a form? If so, put them in an array // all the text elements (just guessing) var txtIn = { 'usernew':'','QPSQTY':'','PTPS':'','PSSQTY':'','PSST':'', 'ECQTY':'','ECT':'','EXQTY':'' }; // all the number elements (just guessing) var numIn = { 'EXT':'','INQTY':'','INTA':'','SKQTY':'','SKT':'', 'CSQTY':'','CST':'','total':'' }; var result, result1, result2, result3, result4, result5, result6, result0, t, n; // Now just loop through the elements of the objects and use // the forms collection - no getElementById/all issues for ( t in txtIn) { txtIn[t] = theForm.elements[t].value; } for ( n in numIn) { numIn[n] = theForm.elements[n].value; } // Test to see if isNaN & modify class accordingly // Demonstrates looping through elements of an object for (t in txtIn) { theForm.elements[t].className = (isNaN(txtIn[t]))? 'isText':'isNumber'; } for (n in numIn) { theForm.elements[n].className = (isNaN(numIn[n]))? 'isText':'isNumber'; } } </script> </head> <body> <form name="formA" action=""> <div> <input type="text" size="20" name="usernew">usernew</input><br> <input type="text" size="20" name="QPSQTY">QPSQTY</input><br> <input type="text" size="20" name="PTPS">PTPS</input><br> <input type="text" size="20" name="PSSQTY">PSSQTY</input><br> <input type="text" size="20" name="PSST">PSST</input><br> <input type="text" size="20" name="ECQTY">ECQTY</input><br> <input type="text" size="20" name="ECT">ECT</input><br> <input type="text" size="20" name="EXQTY">EXQTY</input><br> <input type="text" size="20" name="EXT">EXT</input><br> <input type="text" size="20" name="INQTY">INQTY</input><br> <input type="text" size="20" name="INTA">INTA</input><br> <input type="text" size="20" name="SKQTY">SKQTY</input><br> <input type="text" size="20" name="SKT">SKT</input><br> <input type="text" size="20" name="CSQTY">CSQTY</input><br> <input type="text" size="20" name="CST">CST</input><br> <input type="text" size="20" name="total">total</input><br> <input type="reset"> <input type="button" value="stuff" onclick="SubmitSame(this.form);"> </div> </form> <span id="debugText"></span> <br><br> <input type="text" value="6" onblur=" document.getElementById('xx').innerHTML = this.value + ' isNaN? : ' + isNaN(this.value); "> <span id="xx"></span></body> </html> -- Fred
From: Alvaro G Vicario on 21 Mar 2005 03:46
*** Rick wrote/escribiý (Mon, 21 Mar 2005 04:09:03 GMT): > I have been trying to get this code to work and the isNum seem to be giving > me a problem and I just cannot figure it out any help would me very much > appreciated!! I can think of this: function isNum(data){ return typeof(data)=='number'; } document.writeln(isNum()); document.writeln(isNum(-2)); document.writeln(isNum(0)); document.writeln(isNum(33)); document.writeln(isNum(3.1416)); document.writeln(isNum('951')); document.writeln(isNum('foo')); document.writeln(isNum(document)); document.writeln(isNum(this)); Returns: false true true true true false false false false -- -- ýlvaro G. Vicario - Burgos, Spain -- Don't e-mail me your questions, post them to the group -- |