js正则表达式验证各类需求（整数，实数，小数，时间，URL等）

代码语言：javascript复制

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-uD7FFuF900-uFDCFuFDF0-uFFEF])|(%[da-f]{2})|[!$&'* ,;=]|:)*@)?(((d|[1-9]d|1dd|2[0-4]d|25[0-5]).(d|[1-9]d|1dd|2[0-4]d|25[0-5]).(d|[1-9]d|1dd|2[0-4]d|25[0-5]).(d|[1-9]d|1dd|2[0-4]d|25[0-5]))|((([a-z]|d|[u00A0-uD7FFuF900-uFDCFuFDF0-uFFEF])|(([a-z]|d|[u00A0-uD7FFuF900-uFDCFuFDF0-uFFEF])([a-z]|d|-|.|_|~|[u00A0-uD7FFuF900-uFDCFuFDF0-uFFEF])*([a-z]|d|[u00A0-uD7FFuF900-uFDCFuFDF0-uFFEF]))).) (([a-z]|[u00A0-uD7FFuF900-uFDCFuFDF0-uFFEF])|(([a-z]|[u00A0-uD7FFuF900-uFDCFuFDF0-uFFEF])([a-z]|d|-|.|_|~|[u00A0-uD7FFuF900-uFDCFuFDF0-uFFEF])*([a-z]|[u00A0-uD7FFuF900-uFDCFuFDF0-uFFEF]))).?)(:d*)?)(/((([a-z]|d|-|.|_|~|[u00A0-uD7FFuF900-uFDCFuFDF0-uFFEF])|(%[da-f]{2})|[!$&'* ,;=]|:|@) (/(([a-z]|d|-|.|_|~|[u00A0-uD7FFuF900-uFDCFuFDF0-uFFEF])|(%[da-f]{2})|[!$&'* ,;=]|:|@)*)*)?)?(?((([a-z]|d|-|.|_|~|[u00A0-uD7FFuF900-uFDCFuFDF0-uFFEF])|(%[da-f]{2})|[!$&'* ,;=]|:|@)|[uE000-uF8FF]|/|?)*)?(#((([a-z]|d|-|.|_|~|[u00A0-uD7FFuF900-uFDCFuFDF0-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);  
 }  </pre> 

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