/*
File:  		JsUtilities.js
Description: All the JavaScript Utilities that are used by Homes.com.


Author:		Kiran Adapa
Date:		Feb 2, 2000
*/

// A function to validate the E-mail
 function validEmail(email) {
    invalidChars = " /:,;"

  if (email == "") {      // cannot be empty
   return false
  }
  for (i=0; i<invalidChars.length; i++) { // does it contain any invalid characters?
   badChar = invalidChars.charAt(i)
   if (email.indexOf(badChar,0) > -1) {
    return false
   }
  }
  atPos = email.indexOf("@",1)   // there must be one "@" symbol
  if (atPos == -1) {
   return false
  }
  if (email.indexOf("@",atPos+1) != -1) { // and only one "@" symbol
   return false
  }
  periodPos = email.indexOf(".",atPos)
  if (periodPos == -1) {     // and at least one "." after the "@"
   return false
  }
  if (periodPos+3 > email.length) {  // must be at least 2 characters after the "."
   return false
  }
  return true
}

// Check form field content.
function checkField (thisform, fieldvalue) {
	if (thisform.BookmarkName.value == "") {
	   alert ('Please enter ' +  fieldvalue);
	   return false;
	}
	return true;
}

// Check form for E-mail addresses
 function checkForm (emailform) {
 	  if (emailform.email_target_email.value == "") {
	      alert ('Please enter "Send to" address.');
		  return false
	  }
	  else {  
		   if (!validEmail(emailform.email_target_email.value)) {
		    alert('Invalid "Send to" email address')
		    emailform.email_target_email.focus()
		    emailform.email_target_email.select()
		    return false
		   }
	  }
	  
	   if (emailform.email_from.value == "") {
	      alert ('Please enter "Your email" address.');
		  return false
	   }
	   else {
	   	   if (!validEmail(emailform.email_from.value)) {
		    alert('Invalid email address')
		    emailform.email_from.focus()
		    emailform.email_from.select()
		    return false
		   }
	   }

	  return true
 }

// Check thisform's multiple select list and give an error if selected 
// items count is more than maxcount.
function checkSelectionCount (thisform, selname, maxcount) {
   var j = 0;
   for (var i=0; i<thisform.elements[selname].options.length; i++) {
   	   if(thisform.elements[selname].options[i].selected) j++;
   }

   if (j > maxcount) {
	   alert("Please select " + maxcount + " or fewer items.\nCurrently selected items: " + j);
       return false;
   }
   else {
       return true;
   }

}

// Pops up a child window with the given window name and dimensions
/*
function popupWindow(winname,w,h) {
	if (winname == null) winname = "newWindow";
	if (w == null) w = 600;
	if (h == null) h = 600;
	cwin=window.open("", winname,
	"nomenubar,status,scrollbars,noresizable,width=" + w + ",height=" + h);
return true;
}
*/

// Pops up a child window with the given window name and dimensions.
// Takes the optional arguments to set the menubar, resize, and scrollbars attributes of Window.
function popupWindow(winname,  w, h, menu, resize, scroll) {
	if (winname == null) winname = "newWindow";
	if (w == null) w = 600;
	if (h == null) h = 600;
	if (resize == null) resize = 1;
	
	menutype   = "nomenubar";
	resizetype = "noresizable";
	scrolltype = "noscrollbars";
	if (menu) menutype = "menubar";
	if (resize) resizetype = "resizable";
	if (scroll) scrolltype = "scrollbars";
	
	cwin=window.open("", winname,
		"status," + menutype + "," + scrolltype + "," + resizetype + ",width=" + w + ",height=" + h);
return true;
}

// Submits the form associated with "thiswin" window and displays the results in 
// "popupname" window of dimensions 'w' and 'h'.  Uses popupWindow function. 
function submitClose(thiswin, popupname, w, h, menu, resize, scroll) {
	if (popupname == null) popupname = "resultswindow";
	if (w == null) w = 600;
	if (h == null) h = 600;
	popupWindow(popupname, w, h, menu, resize, scroll);
	
	thiswin.document.forms[0].submit();
	
	thiswin.close();
}

// Checks(status true) or unchecks(status false) all the checkboxes associated with the form.
function CheckUncheck(status) {
   for (i = 0; i < document.forms[0].length; i++) {
      document.forms[0].elements[i].checked = status
   }
}

// Fireworks 3.0  Dreamweaver 3.0 functions follow below
function MM_findObj(n, d) { //v3.0
  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); return x;
}
/* Functions that swaps images. */
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];}
}
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;
}

/* Functions that handle preload. */
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];}}
}