function check_form(form)
{
temp_return = false;
return_boolean = true;

 obj = eval(form)
 for(i=0;i<obj.length;i++)
 {
  field_name = obj.elements[i].name;
 
  /* Make sure field has something selected */ 
  if (field_name.indexOf("ChooseSite") != -1) 
   {
   if (obj.elements[i].value == "")
   {
	obj.elements[i].style.backgroundColor = "yellow";
    alert('No selection made for clinic.');
	return_boolean = false;
   }
   else
   {
   obj.elements[i].style.backgroundColor = "white";  // set to white in case it was red from last time
   } 	
  }
  /* end choosesite */
 
  /* Make sure that if they entered a phone number it matches a telephone pattern */ 
  if (field_name.indexOf("telephone") != -1)
  {
   if (obj.elements[i].value == "")
   {
     obj.elements[i].style.backgroundColor = "white"; // set to white in case it was red from last time
   }
   else
   {
	var errmsg = false;
	/* lets make sure we have enough chars */
	var valueOfNbr = obj.elements[i].value;
	var lenOfNbr   = valueOfNbr.length;
	switch (lenOfNbr)
	{
	 case 8:
	  errmsg = false;
	  break
	 case 12:
	  errmsg = false;
	  break
    
	 default:
	 errmsg = true;
	}
		
	if (errmsg)
    {
	 alert('Use either of these patterns: 123 1234 or 123 123 1234  with dashes, periods or spaces as separators.');
	 obj.elements[i].style.backgroundColor = "yellow";
	  return_boolean = false;
	}
 	else
	{
	 /* if we have the correct length make sure they are all valid telephone chars */
	 var valid = "0123456789- .()";
	 for (var y=0; y < lenOfNbr; y++)
	 {
	  temp = "" + valueOfNbr.substring(y, y+1);
	  if (valid.indexOf(temp) == "-1")
	  {
	    errmsg = true;
	  }
	 }
	 /* if an illegal char was found alert the operator */
	 if (errmsg)
	 {
	   alert("Invalid characters in your telephone number.  Please try again.");
	   obj.elements[i].style.backgroundColor = "yellow";
	   return_boolean = false;
	 }	
	 else
	 {
	   obj.elements[i].style.backgroundColor = "white"; // set to white in case it was red from last time
	 }
	} 
   }
  }
  /* end telephone */
  
  /* Make sure email has data and is a valid email format */
  if (field_name.indexOf("email") != -1)
  {
    var goodEmail = (obj.elements[i].value.match(/\b(^(\S+@).+((\.com)|(\.net)|(\.edu)|(\.mil)|(\.gov)|(\.org)|(\..{2,2}))$)\b/gi));
    if (goodEmail)
    {
	  obj.elements[i].style.backgroundColor = "white"; // set to white in case it was red from last time
    }
    else
    {
     
	 obj.elements[i].style.backgroundColor = "yellow";
     alert('Please enter a valid e-mail address.');
	 return_boolean = false;
    }
  }
  /* end email */ 
  
 
 } 
return return_boolean;
}
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