function showStatus(id,status) {
	var elm = getElm(id);
	elm.className = (status) ? 'statusOkay' : 'statusWrong';
}

function changeImageSrc(id,name) {
	if (document.images[id]) {
		var imgObj = document.images[id];
		var basePath = imgObj.src.substr(0,imgObj.src.lastIndexOf("/")+1);
		imgObj.src = basePath+'?action=getResource&echo='+name;
	}
}

var checkedFields = new Array();

var initialValues = new Array();
var changedFields = new Array();

function checkField(inpfield,id,formname,pattern,type,required) {
	var state;
	if (!document[formname] || !document[formname][inpfield]) return;
	var str = document[formname][inpfield].value;
	var dontChangePositive = false;
	if (initialValues[inpfield]==undefined) {
		initialValues[inpfield] = str;
		dontChangePositive = true;
	} else {
		if (str==initialValues[inpfield])
			dontChangePositive = true;
		initialValues[inpfield] = str;
	}

	if (!checkedFields[inpfield]) {
		checkedFields[inpfield] = null;
	}
	if (checkedFields[inpfield]!=str) {
		checkedFields[inpfield] = str;
		if (str == "" && !required) {
			state = true;
		} else {
			switch (type) {
				case 'validate':
					state = regExxerCheck(pattern,str);
					break;
				case 'choice':
					state = regExxerCheckValue(pattern,str);
					break;
				default:
					state = false;
			}
		}
		if (dontChangePositive && state==1) return;
		changeImageSrc('img'+id,(state) ? 'fieldstatus_valid' : 'fieldstatus_invalid');
		if (state) showStatus(id,1);
		if (document[formname]['commit']) {
			document[formname]['commit'].disabled=(!state);
		}
	}
	return state;
}