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.fname.value == '') {
		  alert('Please enter Your name!');
			document.contact_us.fname.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.phone.value == '') {
		  alert('Please enter Your Phone number!');
			document.contact_us.phone.focus();
			return false;
    	}
		else if(document.contact_us.address.value == '') {
		  alert('Please enter Your Address!');
			document.contact_us.address.focus();
			return false;
    }
	
	else if(document.contact_us.city.value == '') {
		  alert('Please enter Your City!');
			document.contact_us.city.focus();
			return false;
    }
	
	else if(document.contact_us.zip.value == '') {
		  alert('Please enter the Zip code!');
			document.contact_us.zip.focus();
			return false;
    }
	else if(document.contact_us.referal.value == '----------Select----------') {
		  alert('Please specify How did you hear about us!');
			document.contact_us.referal.focus();
			return false;
    }
		
		
		alert('Thank you for Contacting us. One of our Patient Co-ordinator will call you back shortly');
		
  }
  
 function validate_index() {
	  	var emailPat=/^(.+)@(.+)\.(.+)$/;

	  if(document.index.fname.value == 'Name') {
		  alert('Please enter Your name');
			document.index.fname.focus();
			return false;
    }
		else  if(document.index.phone.value == 'Phone') {
		  alert('Please enter Your Phone number');
			document.index.phone.focus();
			return false;
    	}
		
		else if(document.index.email.value == 'E-mail'){
			alert("Please enter your email address");
			document.index.email.focus();
			return false;
		}
		else if (document.index.email.value.search(emailPat)==-1)
		{
			alert("Invalid email address. Please enter again");
			document.index.email.focus();
			return false;
		}
		
		alert('Thank you for Contacting us.One of our Patient Co-ordinator will call you back shortly');
		return true;
		
  }