function validate() {
    //to field not empty
    //text not empty
    //valid number in to field
    //to field can contain only 1 number

    var SMSform = document.getElementsByName("SMSform").item(0);
    var nameField = SMSform.senderName.value;
    var emailField = SMSform.senderEmail.value;
    var mobileField = SMSform.senderMobile.value;
    var bodyField = SMSform.body.value;

    if( nameField.length == 0 ){
      alert("Name field cannot be empty!");
      return;
    }

    if( bodyField.length == 0 ){
      alert("Message cannot be empty!");
      return;
    }

    if (emailField.length == 0 && mobileField.length == 0){
      alert("An email address or mobile number must be entered");
      return;
    }


    SMSform.submit();

  }//end validate


document.write("<form action='http://www.ipipi.com/ExternalContactUsAction.do' METHOD='post' name='SMSform'>")
document.write("<input type='hidden' name='userid' value='")
document.write(id)
document.write("'>")
document.write("<table cellpadding='0' cellspacing='0' border='0'>")
document.write("<tr>")
document.write("<td colspan='3'>")
document.write("</td>")
document.write("</tr>")

document.write("<tr>")
document.write("<td >")
document.write("Name: ")
document.write("</td>")
document.write("<td > ")
document.write(" <input type='text' name='senderName' style='width: 200px;' maxlength='50'>")
document.write("</td>")
document.write("<td align='left'> ")
document.write("</td>")
document.write("</tr>")

document.write("<tr>")
document.write("<td >")
document.write("Email: ")
document.write("</td>")
document.write("<td > ")
document.write("<input type='text' name='senderEmail' style='width: 200px;' maxlength='50'>")
document.write("</td>")
document.write("<td align='left'> ")
document.write("</td>")
document.write("</tr>")

document.write("<tr>")
document.write("<td >")
document.write("Tel: ")
document.write("</td>")
document.write("<td > ")
document.write("<input type='text' name='senderMobile' style='width: 200px;' maxlength='15'>")
document.write("</td>")
document.write("<td align='left'> ")
document.write("</td>")
document.write("</tr>")

document.write("<tr>")
document.write("<td>")
document.write("Subject: ")
document.write("</td>")
document.write("<td > ")
document.write("<input type='text' name='subject' style='width: 200px;' maxlength='50'>")
document.write("</td>")
document.write("<td align='left'> ")
document.write("</td>")
document.write("</tr>")

document.write("<tr>")
document.write("<td>")
document.write("Message: ")
document.write("</td>")
document.write("<td colspan='2'>")
document.write("<textarea name='body' style='width: 200px;' rows='8' maxlength='150' ></textarea>")
document.write("</td>")
document.write("</tr>")


document.write("<tr>")
document.write("<td >")
document.write("</td>")
document.write("<td align='right'>")
document.write("<br>")
document.write("<input type='button' value='Send!' onclick='validate();'>")
document.write("</td>")
document.write("<td >")
document.write("</tr>")

document.write("</table>")
document.write("</form>")