var alphaExp = /^[a-zA-Z]+$/; /* To accept alphabet only */
	var numericExpression = /^[0-9]+$/; /* To accept numbers only */
	var emailExp = /^[\w\-\.\+]+\@[a-zA-Z0-9\.\-]+\.[a-zA-z0-9]{2,4}$/; /* To validate e-mail address */

  function validate() {
	  	
	  if(document.contact_us.name.value == '') {
		  alert('Please enter Your name!');
			document.contact_us.name.focus();
			return false;
    }
		else  if(document.contact_us.phone.value == '') {
		  alert('Please enter Your Phone number!');
			document.contact_us.phone.focus();
			return false;
    	}
		else if(document.contact_us.email.value.length == ''){
			alert("Please enter your email address!");
			document.contact_us.email.focus();
			return false;
		}
		else if(!document.contact_us.email.value.match(emailExp)){
			alert("Invalid email address. Please enter again");
			document.contact_us.email.focus();
			return false;
		}
		else if(document.contact_us.comments.value == ''){
			alert("Please enter Comments!");
			document.contact_us.comments.focus();
			return false;
		}
		/*alert('Thank you for Contacting us.One of our representative will call you back shortly');*/
		
  }