function validateForm()
  {
  		if((document.contactus.topic.options[document.contactus.topic.selectedIndex].value!="") && (document.contactus.personname.value!="") && (document.contactus.company.value!="") && (document.contactus.phone.value!="") && (document.contactus.email.value!="") && (document.contactus.enquiry.value!=""))
		{
			if(echeck(document.contactus.email.value))
			{
				return true;
			}
			else
			{
				document.contactus.email.value = "";
				document.contactus.email.focus();
				return false;
			}
		}
		else
		{
			alert('Please fill in all the fields');
			return false;
		}
		
  }
  
  function echeck(str)
  {
		var at="@"
		var dot="."
		var lat=str.indexOf(at)
		var lstr=str.length
		var ldot=str.indexOf(dot)
		if (str.indexOf(at)==-1){
		   alert("Invalid E-mail Address")
		   return false
		}

		if (str.indexOf(at)==-1 || str.indexOf(at)==0 || str.indexOf(at)==lstr){
		   alert("Invalid E-mail Address")
		   return false
		}

		if (str.indexOf(dot)==-1 || str.indexOf(dot)==0 || str.indexOf(dot)==lstr){
		    alert("Invalid E-mail Address")
		    return false
		}

		 if (str.indexOf(at,(lat+1))!=-1){
		    alert("Invalid E-mail Address")
		    return false
		 }

		 if (str.substring(lat-1,lat)==dot || str.substring(lat+1,lat+2)==dot){
		    alert("Invalid E-mail Address")
		    return false
		 }

		 if (str.indexOf(dot,(lat+2))==-1){
		    alert("Invalid E-mail Address")
		    return false
		 }
		
		 if (str.indexOf(" ")!=-1){
		    alert("Invalid E-mail Address")
		    return false
		 }

 		 return true					
	}