function validateform (theform){

		if (trim (theform.yourname.value) == ""){

			alert ("Please enter your name.");

			theform.yourname.focus();

			return false;

		}

		if (trim (theform.subject.value) == ""){

			alert ("Please enter the subject line.");

			theform.subject.focus();

			return false;

		}

		if (trim (theform.emailbody.value) == ""){

			alert ("Please enter the message.");

			theform.emailbody.focus();

			return false;

		}

		if (!validEmail (trim (theform.youremail.value))){

			alert ("Please enter a valid email address.");

			theform.youremail.focus();

			return false;

		}

		return true;

	}

	function trim(inputString) {

	   // Removes leading and trailing spaces from the passed string. Also removes

	   // consecutive spaces and replaces it with one space. If something besides

	   // a string is passed in (null, custom object, etc.) then return the input.

	   if (typeof inputString != "string") { return inputString; }

	   var retValue = inputString;

	   var ch = retValue.substring(0, 1);

	   while (ch == " ") { // Check for spaces at the beginning of the string

	      retValue = retValue.substring(1, retValue.length);

	      ch = retValue.substring(0, 1);

	   }

	   ch = retValue.substring(retValue.length-1, retValue.length);

	   while (ch == " ") { // Check for spaces at the end of the string

	      retValue = retValue.substring(0, retValue.length-1);

	      ch = retValue.substring(retValue.length-1, retValue.length);

	   }

	   while (retValue.indexOf("  ") != -1) { // Note that there are two spaces in the string - look for multiple spaces within the string

	      retValue = retValue.substring(0, retValue.indexOf("  ")) + retValue.substring(retValue.indexOf("  ")+1, retValue.length); // Again, there are two spaces in each of the strings

	   }

	   return retValue; // Return the trimmed string back to the user

	} // Ends the "trim" function



	//Function to validate email addresses

	function validEmail(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+3 > email.length){

			return false;

		}

		return true;

	}