/*
common javascript functions included on all pages throughout site
*/

function MM_findObj(n, d) { //v4.01
  var p,i,x;  if(!d) d=document; if((p=n.indexOf("?"))>0&&parent.frames.length) {
    d=parent.frames[n.substring(p+1)].document; n=n.substring(0,p);}
  if(!(x=d[n])&&d.all) x=d.all[n]; for (i=0;!x&&i<d.forms.length;i++) x=d.forms[i][n];
  for(i=0;!x&&d.layers&&i<d.layers.length;i++) x=MM_findObj(n,d.layers[i].document);
  if(!x && d.getElementById) x=d.getElementById(n); return x;
}
function MM_swapImage() { //v3.0
  var i,j=0,x,a=MM_swapImage.arguments; 
  document.MM_sr=new Array; 
  
  for(i=0;i<(a.length-2);i+=3) {
		if ((x=MM_findObj(a[i]))!=null) {
			document.MM_sr[j++]=x; 
			if(!x.oSrc) {
				x.oSrc=x.src; 
			}
			x.src=a[i+2];
			
			//make corresponding link show hover state to match img
			if (x.name.indexOf("link") != -1) {
				if (document.getElementById) {
					//alert(x.name)
					objLink = document.getElementById("link_" + x.name);
					objLink.className = "topnavhover";					
				}
			}
		}
	}
}

function MM_swapImgRestore() { //v3.0
  var i,x,a=document.MM_sr; 
  for(i=0;a&&i<a.length&&(x=a[i])&&x.oSrc;i++) {
		x.src=x.oSrc;
		
		//change corresponding link to return to normal state, unless we're IN that section (img name will end in "_f2")
		if (x.name.indexOf("link") != -1 && x.oSrc.indexOf("_f2") == -1) {
			if (document.getElementById) {
				//alert(x.name)
				objLink = document.getElementById("link_" + x.name);
				objLink.className = "topnav";					
			}
		}
	}
}

function MM_preloadImages() { //v3.0
 var d=document; if(d.images){ if(!d.MM_p) d.MM_p=new Array();
   var i,j=d.MM_p.length,a=MM_preloadImages.arguments; for(i=0; i<a.length; i++)
   if (a[i].indexOf("#")!=0){ d.MM_p[j]=new Image; d.MM_p[j++].src=a[i];}}
}


//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;
			}		
		}
	}
}

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));
}

//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>');
	}
}