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URL  
    var 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2010-10-10  
    var 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);  
     }