Replace Characters - JavaScript Made Easy: Free JavaScripts Tutorials Example Code

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JavaScript Basics

Inserting Javascript

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Replace Characters

Replaces a character or multiple characters in a textbox when the visitor goes to the next field (or in this example, clicks the submit button).


Insert into <HEAD>
<SCRIPT LANGUAGE="JavaScript"> <!-- Begin function replaceChars(entry) { out = "a"; // replace this add = "z"; // with this temp = "" + entry; // temporary holder while (temp.indexOf(out)>-1) { pos= temp.indexOf(out); temp = "" + (temp.substring(0, pos) + add + temp.substring((pos + out.length), temp.length)); } document.subform.text.value = temp; } // End --> </script>

Insert into <BODY>
<center> <form name="subform"> <input type=text name=text size=40 value="abcdabcd"><br> <input type=button name=action value="Done!" onClick="replaceChars(document.subform.text.value);"> <!-- Or to make it change when the user clicks the next --> <!-- field, use this instead of the previous two lines: --> <!-- <input type=text name=text size=40 value="abcdabcd" onBlur="replaceChars(this.value);"> --> </form> </center>

Other Options