Form validation component

components.formvalidator.js

function validate_form(fields, invalidCallback, validCallback) {
	if(!fields) {
		invalidCallback();
		return false;
	}
	
	invalid = [];
	
	for(var i in fields) {
		f = fields[i];
		fld = $('#'+f.id);
		
		
		v = true;
		switch(f.mode) {
			case 'number':
				v = validate_number(fld.val(), f);
				break;
			case 'password':
				v = validate_password(fld.val(), f);
				break;
			case 'string':
			default:
				v = validate_string(fld.val(), f);
				break;
		}
		
		if(!v) {
			invalid.push(f.label);
		}
	}
	
	if(invalid.length > 0) {
		invalidCallback(invalid);
		return false;
	} else {
		validCallback(fields);
		return true;
	}
}
			
function validate_string(value, f) {
	if(value == null || value == "" || value == undefined) {
		return false;
	}
				
	if(typeof value != 'string') {
		return false;
	}
				
	if(value.length < f.min || value.length > f.max) {

		return false;
	}
				
	return true;
}
			
function validate_number(value, f) {
	if(value == null || value == "" || value == undefined) {
		return false;
	}
				
	try {
		value = parseInt(value);
	} catch(e) {
		return false;
	}
				
	if(value == f.incorrect) {
		return false;
	}
				
	return true;
}
			
function validate_password(value, f) {
	if(value == null || value == "" || value == undefined) {
		return false;
	}
				
	if(typeof value != 'string') {
		return false;
	}
				
	if(f.compare) {
		compareValue = $('#'+f.compare).val();
		if(!validate_string(compareValue))  {
			return false;
		}
					
		if(value != compareValue) {
			return false;
		}
	}
				
	if(value.length < f.min) {
		return false;
	}
				
	return true;
}