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#1
August 18th, 2005, 12:51 PM
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changing dynamically created form fields with js
I have a page, created by a perl script. It prints a bunch of form fields on to a page, some of which need to be incremented by a JS and then written back to the fields.
I have this code (which increments a set of letters): Code:
<script language=\"javascript\" type=\"text/javascript\">
<!--
function changeButton(FORM_VALUE, FIELD) {
var VALUE_ONE = FORM_VALUE.charCodeAt(0);
var VALUE_TWO = FORM_VALUE.charCodeAt(1);
VALUE_TWO++;
if (VALUE_TWO == 91) {
VALUE_TWO = 65;
VALUE_ONE++;
if (VALUE_ONE == 91) { VALUE_ONE = 65; }
}
VALUE_ONE = String.fromCharCode(VALUE_ONE);
VALUE_TWO = String.fromCharCode(VALUE_TWO);
alert(VALUE_ONE + VALUE_TWO);
document.main.elements[FIELD].value = VALUE_ONE + VALUE_TWO;
}
//-->
</script>
At the end of the code I have "document.main.elements[FIELD].value = VALUE_ONE + VALUE_TWO;" (which doesn't work) the FIELD variable passed to this function is the name of the form field. Is there any way to make this work? It would be a pain to do it by field numbers because it is almost completely random how many fields come before it. thanks!
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#2
August 18th, 2005, 01:29 PM
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nevermind, fixed it by doing it this way instead:
Code:
<script language=\"javascript\" type=\"text/javascript\">
<!--
function changeButton(FIELD) {
var VALUE_ONE = document.getElementById(FIELD).value.charCodeAt(0) ;
var VALUE_TWO = document.getElementById(FIELD).value.charCodeAt(1) ;
VALUE_TWO++;
if (VALUE_TWO == 91) {
VALUE_TWO = 65;
VALUE_ONE++;
if (VALUE_ONE == 91) { VALUE_ONE = 65; }
}
VALUE_ONE = String.fromCharCode(VALUE_ONE);
VALUE_TWO = String.fromCharCode(VALUE_TWO);
document.getElementById(FIELD).value = VALUE_ONE + VALUE_TWO;
}
//-->
</script>
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#5
August 18th, 2005, 04:56 PM
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Quote:
Source File: program's url Line: 86
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