Chapter 8: Forms and Regular Expressions

Extracting Strings

Script 8.4

This JavaScript rearranges an entered list of names.

window.onload = initForms;

function initForms() {
	for (var i=0; i< document.forms.length; i++) {
		document.forms[i].onsubmit = function() {return validForm();}
	}
}

function validForm() {
	var allTags = document.getElementsByTagName("*");

for (var i=0; i<allTags.length; i++) {
		validTag(allTags[i]);
	}
	return false;

function validTag(thisTag) {
		var allClasses = thisTag.className.split(" ");
	
		for (var j=0; j<allClasses.length; j++) {
			validBasedOnClass(allClasses[j]);
		}

function validBasedOnClass(thisClass) {
			switch(thisClass) {
				case "":
					break;
				case "nameList":
					thisTag.value = nameList(thisTag.value);
				default:
			}
		}
		
		function nameList(inNameList) {
			var newNames = new Array;
			var newNameField = "";

var re = /\s*\n\s*/;
			var nameList = inNameList.split(re);

re = /(\S+)\s(\S+)/;

for (var k=0; k<nameList.length; k++) {
				newNames[k] = nameList[k].replace(re, "$2, $1");
			}

for (k=0; k<newNames.length; k++) {
				newNameField += newNames[k] + "\n";
			}
			return newNameField;
		}
	}
}

Contents:

Extracting Strings

Script 8.4