/*--------------------------------------------------------------------------
swap()
	
	source from the webmonkey code library 			
	(http://hotwired.lycos.com/webmonkey/reference/javascript_code_library/)
	Function: Changes the source of an image.
    Use: swap(originalImage, 'newSourceUrl');
--------------------------------------------------------------------------*/
 function swap(daImage, daSrc)
	{
	 var objStr,obj;


  // Check to make sure that images are supported in the DOM.
  if(document.images){
    // Check to see whether you are using a name, number, or object
    if (typeof(daImage) == 'string') {
      // This whole objStr nonesense is here solely to gain compatability
      // with ie3 for the mac.
      objStr = 'document.' + daImage;
      obj = eval(objStr);
      obj.src = daSrc;
    } else if ((typeof(daImage) == 'object') && daImage && daImage.src) {
      daImage.src = daSrc;
    }
  }
}
/*--------------------------------------------------------------------------
isValid()
	Author: Alexia P. Bell (ember@innocent.com) 
	Use: on Form tag: onSubmit="return isValid();"
	Function: To validate form fields - if form fields aren't valid, 
	user cannot submit form. 
--------------------------------------------------------------------------*/

	
function isValid()
	{//opens the function
		with(document.forms[0])
		{//opens the with
			if (realname.value=="") //check if a name has been entered 
				{
					alert("Please enter your name");
					realname.focus();
					return false;
				}

			//validate email for an @ symbol
			var theAt = email.value.indexOf("@",1);
			if (theAt==-1)
				{
					alert("Please provide a valid email address");
					email.focus();
					email.select();
					return false;
				}

			//validate email for a "." after the "@"
			if (email.value.indexOf(".",theAt)==-1)
				{
					alert("Please provide a valid email address");
					email.focus();
					email.select();
					return false;
				}
		
		//validate text area for comments(not default)
			if (comments.value==comments.defaultValue || comments.value=="")
				{
					alert("Please provide a comment");
					comments.focus();
					comments.select();
					return false;
				}					

		return true; //if all the above ifs don't run, return true so the submit will run.
		}//closes the with
		
	}//closes the function
	


/*--------------------------------------------------------------------------
source from the webmonkey code library (http://hotwired.lycos.com/webmonkey/reference/javascript_code_library/)
--------------------------------------------------------------------------*/

function preload() 
{
  if (document.images)
	  {
			if (typeof(document.img) == 'undefined'){
			document.img = new Object();
		}
    document.img.loadedImages = new Array();
    var argLength = preload.arguments.length;
    for(i=0; i < argLength; i++) 
		{
      document.img.loadedImages[i] = new Image();
      document.img.loadedImages[i].src = preload.arguments[i];
    }
  }
}