js正则表达式验证各类需求（整数，实数，小数，时间，URL等）

function validateNum(val){//验证整数var patten = /^-?\d+$/;return patten.test(val); }function validateRealNum(val){//验证实数 var patten = /^-?\d+\.?\d*$/; return patten.test(val);  }function validateNum(val){//验证小数，保留一位小数点 var patten = /^-?\d+\.?\d{0,1}$/; return patten.test(val);  }  function validateFloat(val){//验证小数var patten = /^-?(?:\d+|\d{1,3}(?:,\d{3})+)(?:\.\d+)?$/;return patten.test(val); }  function validateNumOrLetter(val){//只能输入数字和字母        var patten = /^[A-Za-z0-9]+$/;        return patten.test(val); }  function validateColor(val){//验证颜色var patten =  /^#[0-9a-fA-F]{6}$/;return patten.test(val); }  function validateUrl(val){ //验证URLvar patten = /^(https?|ftp):\/\/(((([a-z]|\d|-|\.|_|~|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])|(%[\da-f]{2})|[!\$&'\(\)\*\+,;=]|:)*@)?(((\d|[1-9]\d|1\d\d|2[0-4]\d|25[0-5])\.(\d|[1-9]\d|1\d\d|2[0-4]\d|25[0-5])\.(\d|[1-9]\d|1\d\d|2[0-4]\d|25[0-5])\.(\d|[1-9]\d|1\d\d|2[0-4]\d|25[0-5]))|((([a-z]|\d|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])|(([a-z]|\d|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])([a-z]|\d|-|\.|_|~|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])*([a-z]|\d|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])))\.)+(([a-z]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])|(([a-z]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])([a-z]|\d|-|\.|_|~|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])*([a-z]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])))\.?)(:\d*)?)(\/((([a-z]|\d|-|\.|_|~|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])|(%[\da-f]{2})|[!\$&'\(\)\*\+,;=]|:|@)+(\/(([a-z]|\d|-|\.|_|~|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])|(%[\da-f]{2})|[!\$&'\(\)\*\+,;=]|:|@)*)*)?)?(\?((([a-z]|\d|-|\.|_|~|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])|(%[\da-f]{2})|[!\$&'\(\)\*\+,;=]|:|@)|[\uE000-\uF8FF]|\/|\?)*)?(\#((([a-z]|\d|-|\.|_|~|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])|(%[\da-f]{2})|[!\$&'\(\)\*\+,;=]|:|@)|\/|\?)*)?$/i;return patten.test(val); }  function validateNull(val){//验证空return val.replace(/\s+/g, "").length==0; }  function validateDate(val){//验证时间2010-10-10var patten = /^\d{4}[\/-]\d{1,2}[\/-]\d{1,2}$/;return patten.test(val); }  function validateNumLetterLine(val){//只能输入数字、字母、下划线    var patten =  /^[a-zA-Z0-9_]{1,}$/;return patten.test(val); }