function frm_validate() {

   obj=document.forms['form'];
   strError="";
   if (obj.name.value    == ""){
	    strError += "<li>Please supply your full name<br /></li>";
		document.getElementById("errorname").className = "red";
   }
   if (obj.address.value   == ""){
	   strError += "<li>Please supply your correspondence address<br /></li>";
		document.getElementById("erroraddress").className = "red";
   }
   if (obj.contactNumber.value == "" || !isNum(obj.contactNumber.value)){
	   strError += "<li>Please supply your contact number<br /></li>";
		document.getElementById("errorcontactNumber").className = "red";
   }
   if (obj.email.value   == "" || obj.email.value.indexOf("@") < 0 || obj.email.value.indexOf(".") < 0) {
	   strError += "<li>Please supply an email address<br /></li>";
		document.getElementById("erroremail").className = "red";
   }
   if (obj.interestedTour.value   == ""){
	   strError += "<li>Please supply the interested tour<br /></li>";
		document.getElementById("errorinterestedTour").className = "red";
   }
   if (obj.notes.value  == ""){
	   strError += "<li>Please supply the notes<br /></li>";  	
		document.getElementById("errornotes").className = "red";
   }
   if(strError!=""){
		document.getElementById("displayerror").style.display = "block";
		document.getElementById("displayerror").innerHTML = "<p class='warn'>Oops! please correct the following problems...</p><ul>"+strError+"</ul>";
		return false;
   }
   return true;
}