js正则表达式验证各类需求（整数，实数，小数，时间，url等）-尊龙凯时

    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 validate{ //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);  
     }