function box_hint(obj,target_value,onblur){
	if(obj.value == target_value){
		obj.value = '';	
	}
	
	if(onblur == 1 && obj.value.trim() == ''){
		obj.value = target_value;
	}
}


String.prototype.trim = function() {
	return this.replace(/^\s+|\s+$/g,"");
}
String.prototype.ltrim = function() {
	return this.replace(/^\s+/,"");
}
String.prototype.rtrim = function() {
	return this.replace(/\s+$/,"");
}

function multiple_ok(form,fileString) { 

	var ret_err = false; 
	
	//check if there's only of FILE input - validate IT!
	if(form.elements[fileString+'[]'].value == ''){
		ret_err = false;
	}else{
		if(form.elements[fileString+'[]'].length){
			for (i=0; i<form.elements[fileString+'[]'].length; i++){ 
				if(form.elements[fileString+'[]'][i].value.trim() != '') {
					ret_err = true;
					break;
				} 
			} 
		}
	}
	return ret_err;
}