function validate_form()
{
	// Get form element values
	var name  = document.getElementById("name").value;
	var address  = document.getElementById("address").value;
	var town  = document.getElementById("town").value;
	var postcode  = document.getElementById("postcode").value;
	var email  = document.getElementById("email").value;
	var tel  = document.getElementById("tel").value;
	var enquiry  = document.getElementById("enquiry").value;
	
	// Reset border colour of form elemnts to GREY
	document.getElementById("name").style.border="solid 1px #A5A5A5";
	document.getElementById("address").style.border="solid 1px #A5A5A5";
	document.getElementById("town").style.border="solid 1px #A5A5A5";
	document.getElementById("postcode").style.border="solid 1px #A5A5A5";
	document.getElementById("email").style.border="solid 1px #A5A5A5";
	document.getElementById("tel").style.border="solid 1px #A5A5A5";	
	document.getElementById("enquiry").style.border="solid 1px #A5A5A5";	
	
	
	var valid = true;
	
	if (name == null || name=="") 	{
		valid = false;
		document.getElementById("name").style.border="solid 1px #FF0000";
		
	}		
	if (address == null || address==""){		
		valid = false;
		document.getElementById("address").style.border="solid 1px #FF0000";
	}
	
	if (town == null || town==""){		
		valid = false;
		document.getElementById("town").style.border="solid 1px #FF0000";
	}
	if (postcode == null || postcode==""){		
		valid = false;
		document.getElementById("postcode").style.border="solid 1px #FF0000";
	}	
	
	if (email == null || email== "" || echeck(email)==false){		
		valid = false; 
		document.getElementById("email").style.border="solid 1px #FF0000";
	}
	if (tel == null || tel=="") {
		valid = false;
		document.getElementById("tel").style.border="solid 1px #FF0000";
	}
	if (enquiry == null || enquiry=="") {
		valid = false;
		document.getElementById("enquiry").style.border="solid 1px #FF0000";
	}
	
	// Finally check if form is valid and submit
	return valid; 


}

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 Email Address")
		   return false
		}

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

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

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

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

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

 		 return true					
}