Red Alert: Automatic Form Length Checker Script Code

Red Alert: Automatic Form Length Checker Script Code
Great utility if you are using feedback forms on your web site! Red Alert changes the background color of textfields to red if the text of your visitor gets too long. IE4 or higher.

Test the Automatic Form Length Checker Script Code
Write a very long text in the textfield form boxes below:

Install the script

Step 1: Open your web page. Paste the following code between the <head> and </head> tags:

<SCRIPT LANGUAGE="JavaScript">
// CREDITS:
// Red Alert: Automatic Form-Length-Checker
// by Urs Dudli and Peter Gehrig 
// Copyright (c) 2001 Peter Gehrig and Urs Dudli. All rights reserved.
// Permission given to use the script provided that this notice remains as is.
// Additional scripts can be found at http://www.24fun.com & http://www.designerwiz.com
// info@24fun.ch
// 5/15/2001

// IMPORTANT: 
// If you add this script to a script-library or script-archive 
// you have to add a link to http://www.24fun.com on the webpage 
// where this script will be running.

// Configure the alert color. 
var alertcolor="red"

// Do not change the code below
var formobj
var styleobj

function getnames(formname,fieldname) {
	if (document.all) {
		var frmname=formname
		var fldname=fieldname
		formobj=eval("document."+formname+"."+fieldname)
		styleobj=eval("document.all."+fieldname+".style")
		checkcolor()
	}
}

function checkcolor() {
	if((formobj.value == null ) || (formobj.value.length < formobj.maxLength)) { 
		styleobj.backgroundColor="white"
	}
	if(formobj.value.length >= formobj.maxLength) { styleobj.backgroundColor=alertcolor;
	}
	var timer=setTimeout("checkcolor()",500)
}
</script>

Step 2: Open your web page. Create a form with textfields between the <body> and </body> tags.
See blue-red-purple-brown-green sample below:

code red: give your form a name.
code purple: give each textfield a name.
code brown: set the maximal length of the fexfields (letters).
code green: add this code to each textfield.

Download tons of free copy-and-paste scripts

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