function checkform(){

		var fields = new Array();   
    fields[0] = $("#ownname");
		fields[1] = $("#ownemail");
		fields[2] = $("#friendname");
		fields[3] = $("#friendemail");
		// fields[4] = $("#message");

		 for (x in fields)
			{
	    	fields[x].css("background-color","#ffffff");
	    	fields[x].css("border","1px solid #ffffff");
	    }
		 
    //alert($("#storename").val());
    var errorLine = "";
	  var errorMsg = "";
	  var errorNr = 0;

    var errorFields = new Array();
    var hasError = "false";
	    
		for (x in fields)
		{	
       if(fields[x].val()==""){
        		//alert(fields[x].attr("id"));
                errorNr = ++errorNr;
					errorLine = errorNr + ". The field "+fields[x].attr("id")+" is empty.\n\n";
					errorMsg += errorLine;
                hasError = "true";
                errorFields.push(fields[x]);
        }
        else
        {
        	if(fields[x].attr("id")=="ownemail" || fields[x].attr("id")=="friendemail"){
            	var emailReg = /^([\w-\.]+@([\w-]+\.)+[\w-]{2,4})?$/;
					var testvar = fields[x].val();
                if(!emailReg.test(testvar)){
                	errorNr = ++errorNr;
						errorLine = errorNr + ". Use a correct e-mailladdress, please.\n\n";
						errorMsg += errorLine;
                    hasError = "true";
                    errorFields.push(fields[x]);
                }
             }
                
            
        }
		}
    
    for (x in errorFields)
		{
    	errorFields[x].css("background-color","#ffcccc");
    errorFields[x].css("border","1px solid #ff0000");
    }
    
    if(hasError=="true"){
    //alert("Error detected");
    alert(errorMsg);
    return false;
    }
    else
    {
    //alert("Geen error?");
    return true;
    }
   
    
    //
    //window.alert(errorMsg);
}