// define the global variable screenWidth (will be local only if preceeded by "var")
// http://www.webdevelopersnotes.com/tutorials/javascript/global_local_variables_scope_javascript.php3
screenWidth = screen.width;

function doClear(theText) {
	if (theText.value == theText.defaultValue) {
        theText.value = ""
    }
}

function isClear(theText) {
	if(theText.value == "") {
		theText.value = theText.defaultValue;
	}
}

function swapImg(name){
	var imgName = "images/portfolio/" + name + ".jpg";
	window.document.MainImage.src = imgName;
}

function popup(myUrl, myWidth, myHeight) {

// check if "Popup" is already open, if so, give it the focus 

  screenWidth = screen.width;
  screenHeight = screen.height;
  myLeft = (screenWidth - myWidth)-80;
  myTop = 80; //(screenHeight - myHeight - 60)/2;

  OpenWin = this.open(myUrl, "Popup", "toolbar=no,menubar=no,location=no,scrollbars=yes,resizable=yes,width="+myWidth+",height="+myHeight+",screenX="+myLeft+",screenY="+myTop+",left="+myLeft+",top="+myTop);
}

// to validate an email entry
function validate_email(myForm) {
	if (!verify(myForm.fields_email.value)) {
		alert ("Please enter a valid email address.");
		myForm.fields_email.focus()
		myForm.fields_email.select()
		return false;
	}
	if (myForm.fields_email.value == 'email here') {
		alert ("Please enter a valid email address.");
		myForm.fields_email.focus()
		myForm.fields_email.select()
		return false;
	}	
	return true;
}

// to validate the info request form
function validate_reach(myForm) {
	if (myForm.name.value == "") {
		alert ("Please enter your name.")
		myForm.name.focus()
		myForm.name.select()
		return false;
	}
/*	if (myForm.phone.value == "") {
		alert ("Please enter your phone number.")
		myForm.phone.focus()
		myForm.phone.select()
		return false;
	}		*/
	if (!verify(myForm.fields_email.value)) {
		alert ("You must enter a valid email address.");
		myForm.fields_email.focus()
		myForm.fields_email.select()
		return false;
	}
	myForm.Submit.disabled = true;
	return true;
}

function verify(email) {
 invalidChars = " /:,;"
 if (email == "") {
  return false;
 }

 for (i=0; i<invalidChars.length; i++) {
  badChar = invalidChars.charAt(i)
  if (email.indexOf(badChar,0) > -1) {
   return false;
  }
 }
 atPos = email.indexOf("@",1);
 if (atPos == -1) {
  return false;
 }
 if (email.indexOf("@",atPos+1) > -1) {
    return false;
 }
 periodPos = email.indexOf(".",atPos);
 if (periodPos == -1) {
  return false;
 }
 if (periodPos+3 > email.length) {
  return false;
 }
 return true;
}

/* IMAGE ROLLOVER FXNS */
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;
}

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];}}
}

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];}
}