function echeck(str) {
   var reg = /^([A-Za-z0-9_\-\.])+\@([A-Za-z0-9_\-\.])+\.([A-Za-z]{2,4})$/;
   var address = contactus.email.value;
   if(reg.test(address) == false) {
      alert('Invalid Email Address');
      return false;
   }
}


function checkContactForm()
	{
	//var email=document.frmSample.txtEmail
	
	if ((contactus.name.value==null)||(contactus.name.value=="")){
		alert("Please enter your full name.")
		return false
		contactus.name.focus()
	}
	if ((contactus.email.value==null)||(contactus.email.value=="")){
		alert("Please enter your email address.")
		contactus.email.focus()
		return false
	}
	if (echeck(contactus.email.value)==false){
		contactus.email.value=""
		contactus.email.focus()
		return false
	}
	if ((contactus.mobile.value==null)||(contactus.mobile.value=="")){
		alert("Please enter your mobile number.")
		contactus.mobile.focus()
		return false
	}
	if ((contactus.enquirytype.value=="")||(contactus.enquirytype.value=="")){
		alert("Please select enquiry type.")
		contactus.enquirytype.focus()
		return false
	}
	if ((contactus.enquiry.value==null)||(contactus.enquiry.value=="")){
		alert("Please enter enquiry details.")
		contactus.enquiry.focus()
		return false
	}
 }