正则表达式

var defreg = {
		"img": /(.|/)(gif|jpe?g|png)$/i,
		"doc": /(.|/)(pdf|doc|docx|ppt|pptx)$/i,
		"mobile": /^0?(13|15|18|14|17)[0-9]{9}$/,
		"email": /^([a-zA-Z0-9]+[_|\_|.]?)*[a-zA-Z0-9]+@([a-zA-Z0-9]+[_|\_|.]?)*[a-zA-Z0-9]+.[a-zA-Z]{2,4}$/,
		"emailmobile": /^1d{10}$|^([a-zA-Z0-9]+[_|\_|.]?)*[a-zA-Z0-9]+@([a-zA-Z0-9]+[_|\_|.]?)*[a-zA-Z0-9]+.[a-zA-Z]{2,4}$/,
		"password": /^[^u4E00-u9FA5uF900-uFA2Du0020]{6,16}$/,
		"loginname": /^[^u4E00-u9FA5uF900-uFA2Du0020]{26}$/,
		//"password":/^[0-9a-zA-Z]{8,16}$/,
		"url": /((https|http|ftp|rtsp|mms)://)?(([0-9a-z_!~*'().&=+$%-]+:)?[0-9a-z_!~*'().&=+$%-]+@)?(([0-9]{1,3}.){3}[0-9]{1,3}|([0-9a-z_!~*'()-]+.)*([0-9a-z][0-9a-z-]{0,61})?[0-9a-z].[a-z]{2,6})(:[0-9]{1,4})?((/?)|(/[0-9a-z_!~*'().;?:@&=+$,%#-]+)+/?)/g,
		"mobilecode": /^d{6}$/,
		"yaocode": /^d{6}$/,
		"realname": /^[u4e00-u9fa5]{2,5}$/i,
		"amount": /^[0-9]+([.]{1}[0-9]{1,2})?$/,
		"vcode": /^w{4}$/
	}

　　

function defcheck(str, f) {
	if (defreg.hasOwnProperty(f) && defreg[f].test(str)) {
		return true;
	} else {
		return false;
	}
}