/*
common javascript functions included on all pages throughout site
*/
//change the url of a page
function changePage(url) {
	if (url != '') location.href = url;
}


//generic wndow opener
function openWin(url, winName, specs) {
	if (winName == '') winName = 'win';	
	var win1 = window.open(url, winName, specs);								
	win1.focus();
}

//clear error
function clearError (errField) {
	errField.className = "";
	
	if (document.getElementById) {
		document.getElementById("err_" + errField.name).innerHTML = "";
		document.getElementById("err_" + errField.name).style.display = "none";
	}
}

//raise error
function raiseError (errField, errMsg) {
	if (errMsg != '') {
		
		if (document.getElementById) {
			document.getElementById("err_" + errField.name).innerHTML = errMsg;
			document.getElementById("err_" + errField.name).style.display = "block";
		}
		else {
			alert(errMsg);		
		}
	}
	
	if (errField != null) {				
		errField.focus();		
		errField.className = "fielderror";
	}
	
	return false;
}

//clear all form fields
//whichForm: name of form we're dealing with
//ignoreFields: comma-delimited list of field names we don't want to touch (begin/end with a comma!)
function clearForm(whichForm, ignoreFields) {	
	for (var i=0; i<whichForm.elements.length; i++) {
		curElement = whichForm.elements[i];
		//alert(curElement.type)
		if (ignoreFields.indexOf(',' + curElement.name + ',') == -1) {
			if (curElement.type == 'text') {		
				curElement.value = '';
			}
			else if (curElement.type == 'select-one') {		
				curElement.selectedIndex = 0;
			}		
		}
	}
}


//count characters left in a form field
function textCounter(field, countfield, maxlimit) {
	if (field.value.length > maxlimit) // if too long...this trims it!
		field.value = field.value.substring(0, maxlimit);
	else // otherwise, update 'characters left' counter
		countfield.value = maxlimit - field.value.length;
}


//hide user emails on site so they can't be farmed by spiders
function hideEmail(domain, user, strDisplay) {
	document.write('<a href=\"mailto:' + user + '@' + domain + '\">');
	if (strDisplay == null || strDisplay == '') {
		document.write(user + '@' + domain + '</a>');
	}
	else {
		document.write(strDisplay + '</a>');
	}
}


function isEmail(str) {
  // are regular expressions supported?
  var supported = 0;
  if (window.RegExp) {
    var tempStr = "a";
    var tempReg = new RegExp(tempStr);
    if (tempReg.test(tempStr)) supported = 1;
  }
  if (!supported) 
    return (str.indexOf(".") > 2) && (str.indexOf("@") > 0);
  var r1 = new RegExp("(@.*@)|(\\.\\.)|(@\\.)|(^\\.)");
  var r2 = new RegExp("^.+\\@(\\[?)[a-zA-Z0-9\\-\\.]+\\.([a-zA-Z]{2,3}|[0-9]{1,3})(\\]?)$");
  return (!r1.test(str) && r2.test(str));
}