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);
 }