$(document).ready(function(){
	var advSearchDataTypes = [
							  
		{ name: 'price_min', type: 'numeric' },
		{ name: 'price_max', type: 'numeric' },
		{ name: 'length', type: 'numeric' },
		{ name: 'width', type: 'numeric' },
		{ name: 'max_results', type: 'numeric' },
		{ name: 'day_limit', type: 'numeric' }
		
	];

	for (var index in advSearchDataTypes)
	{
		var name = advSearchDataTypes[index].name;
		var type = advSearchDataTypes[index].type;

		$('#' + name).bind('change', function(){
			if (type == 'numeric' && !/^\d*$/.test(this.value))
			{
				alert('Please enter a Number.');
				this.value = '';
			}
		});
	}
});