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Only with browsers that support HTML 4.0, currently Internet Explorer 4+ and Netscape Navigator 6+, with:
<FORM> <INPUT TYPE="TEXT" VALUE="In HTML 4.0 this should be write protected" READONLY> </FORM>
You can use JavaScript (in Internet Explorer 4) to set the value of the readOnly attribute:
<SCRIPT LANGUAGE="JavaScript"><!--
function toggle() {
if (document.all) {
document.myName.myField.readOnly = !document.myName.myField.readOnly;
}
}
//--></SCRIPT>
<FORM NAME="myForm">
<INPUT NAME="myField" TYPE="TEXT" VALUE="In HTML 4.0 this should be write protected" READONLY>
<INPUT TYPE="BUTTON" VALUE="Toggle readOnly status" onClick="toggle()">
</FORM>Take a look at the article at http://www.developer.com/journal/techworkshop/webb2/111798_form.html for more techniques of write protecting form fields.