function validate_email(v_emailstr){
  	var emailck= /^([\w\-\.]+)@((\[([0-9]{1,3}\.){3}[0-9]{1,3}\])|(([\w\-]+\.)+)([a-zA-Z]{2,4}))$/;
		return (emailck.test(v_emailstr));	
	}
	
	function validate_form (){
	var emailstr = document.contactlog.Emaillog.value;
	var passw = document.contactlog.Password.value;
	var result = true;
	var	errormsg = "";
	var b1 = validate_email(emailstr);
  var b2 = ( passw != "" );
  var b3 = ( emailstr != "" );
	var newline = "<br /><br />";	
	if (b2 && b3){
    	if (b1){
    		// result = true;
				result = false;
				errormsg += "Please Re-enter Your Login Details";
    	} else {
        	errormsg += "Email address: Please enter a valid one e.g. john@hotmail.com, mary@yahoo.co.uk" + newline;    
        	result = false;		 
    	}	 	 
	} else {	
    	if (b3==false) {	
    	errormsg += "Email address: We need one to contact you." + newline;    
    	}
    	if (b2==false) {	
    	errormsg += "Password: Please enter your password." + newline;
    	}
    	result = false;	
	}
	if (!result && errormsg != ""){
		 document.getElementById("errorlog").innerHTML = errormsg;
	}		
  return result;
 }